A demented hockey coach creates an army of deadly clones to destroy the NHL, but S.T.C. has a few things to S.A.Y. about that.

The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.

Harris is newly unemployed, depressed and has moved back into the house, while Becky struggles to find affordable childcare; Jackie suggests Becky reach out to Emilio's family for support; the family contemplates tattoos.

Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.

A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.

The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.

A demented hockey coach creates an army of deadly clones to destroy the NHL, but S.T.C. has a few things to S.A.Y. about that.

Doug and Carrie's neighbor (Bryan Cranston) builds an aboveground pool that looks directly into their property.

Doug's (Kevin James) Uncle Stu (guest star Gavin MacLeod) talks him into helping his down-and-out cousin (guest star Gary Valentine) land a job at IPS.

Carrie and Doug (Leah Remini, Kevin James) ponder a major readjustment after a night of passion leads to a surprise.

Carrie and Doug (Leah Remini, Kevin James) ponder a major readjustment after a night of passion leads to a surprise.

After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.

A demented hockey coach creates an army of deadly clones to destroy the NHL, but S.T.C. has a few things to S.A.Y. about that.

Darlene, desperate for money, gets a job at Price Warehouse; Jackie decides to take her throuple relationship with Ron and Janelle to the next level; Ben shaves his beard in an attempt to appear more clean-cut to potential advertisers.

Harris is newly unemployed, depressed and has moved back into the house, while Becky struggles to find affordable childcare; Jackie suggests Becky reach out to Emilio's family for support; the family contemplates tattoos.

Lacey's not invited to the Harvest Dance; Emma's dreaded jelly salad; Hank falls for highway worker.

Brent behaves differently when Wanda wears a skirt to work; feeling empowered, she tests the limits of her feminine charm, but Brent's new attitude toward her may not be motivating.

There's a food shortage at Corner Gas, causing a panic in Dog River; Lacey takes advantage of the situation by offering locals "exotic" recipes at The Ruby.

Wanda, Hank, and Lacey attempt to terrorize Brent with a Sasquatch hoax; Davis and Emma's obsession with a fantasy TV show called THRONE STRIFE forces Karen and Oscar to spend time together.

Peter, Adam, Jeff and James are four dudes out for a night on the town; they are so excited to be in the Cash Cab.

These gals have been waiting for the day that they get to be on "Cash Cab," and here it is; unfortunately for them, they get two strikes at the start of the game.

Lacey's not invited to the Harvest Dance; Emma's dreaded jelly salad; Hank falls for highway worker.

Brent behaves differently when Wanda wears a skirt to work; feeling empowered, she tests the limits of her feminine charm, but Brent's new attitude toward her may not be motivating.

There's a food shortage at Corner Gas, causing a panic in Dog River; Lacey takes advantage of the situation by offering locals "exotic" recipes at The Ruby.

Wanda, Hank, and Lacey attempt to terrorize Brent with a Sasquatch hoax; Davis and Emma's obsession with a fantasy TV show called THRONE STRIFE forces Karen and Oscar to spend time together.

Peter, Adam, Jeff and James are four dudes out for a night on the town; they are so excited to be in the Cash Cab.

These gals have been waiting for the day that they get to be on "Cash Cab," and here it is; unfortunately for them, they get two strikes at the start of the game.

Lacey's not invited to the Harvest Dance; Emma's dreaded jelly salad; Hank falls for highway worker.

Brent behaves differently when Wanda wears a skirt to work; feeling empowered, she tests the limits of her feminine charm, but Brent's new attitude toward her may not be motivating.

There's a food shortage at Corner Gas, causing a panic in Dog River; Lacey takes advantage of the situation by offering locals "exotic" recipes at The Ruby.

Wanda, Hank, and Lacey attempt to terrorize Brent with a Sasquatch hoax; Davis and Emma's obsession with a fantasy TV show called THRONE STRIFE forces Karen and Oscar to spend time together.

Bev is back from Arizona and realizes she'd like to use her finances to spread happiness; Bev decides to fund Mark's tuition to a prestigious coding camp, but Darlene tries to convince her to give the money to Harris instead.

Doug and Carrie's neighbor (Bryan Cranston) builds an aboveground pool that looks directly into their property.

Doug's (Kevin James) Uncle Stu (guest star Gavin MacLeod) talks him into helping his down-and-out cousin (guest star Gary Valentine) land a job at IPS.

Carrie and Doug (Leah Remini, Kevin James) ponder a major readjustment after a night of passion leads to a surprise.

Carrie and Doug (Leah Remini, Kevin James) ponder a major readjustment after a night of passion leads to a surprise.

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.

Howard considers whether he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

Bev is back from Arizona and realizes she'd like to use her finances to spread happiness; Bev decides to fund Mark's tuition to a prestigious coding camp, but Darlene tries to convince her to give the money to Harris instead.

Dan is finally ready to share his feelings with Louise; Darlene realizes how badly she wants a baby; Ben gets caught up playing handyman and babysitter for Becky, which causes him to miss an important meeting.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

Monica's high-school friend visits after leaving her fiancé at the altar.

Monica begins to feel the heat when she prepares dinner for her parents (Elliott Gould, Christina Pickles).

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.

Howard considers whether he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

Dan is finally ready to share his feelings with Louise; Darlene realizes how badly she wants a baby; Ben gets caught up playing handyman and babysitter for Becky, which causes him to miss an important meeting.

Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.

Howard considers whether he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.

The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

Monica's high-school friend visits after leaving her fiancé at the altar.

Monica begins to feel the heat when she prepares dinner for her parents (Elliott Gould, Christina Pickles).

Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.

Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.

Bev is back from Arizona and realizes she'd like to use her finances to spread happiness; Bev decides to fund Mark's tuition to a prestigious coding camp, but Darlene tries to convince her to give the money to Harris instead.

Dan is finally ready to share his feelings with Louise; Darlene realizes how badly she wants a baby; Ben gets caught up playing handyman and babysitter for Becky, which causes him to miss an important meeting.

Hank's premonitions freak Wanda out; Lacey fixes the pothole.

When Emma gives Brent flack over his coffee drinking, he vows to quit cold turkey if she quits knitting; as Brent struggles in a caffeine free world, Emma takes up a new pastime.

Brent and the citizens of Dog River are annoyed when Lacey tries to make them eat local; Davis tries to train bees; Wanda sells homemade candles.

Wanda and Lacey entice the residents of Dog River with clickbait texts, while Oscar sets up a bait shop across the street from Corner Gas to teach Brent a business lesson; Davis and Karen involve Hank in a training exercise with chaotic results.

Unsuspecting taxi cab passengers answer trivia questions posed by host Ben Bailey; the passengers may reach their destination with cold hard cash or walk away empty-handed.

This gang is stoked to find out that they have entered the Cash Cab, bur they get a strike early in the game.

Hank's premonitions freak Wanda out; Lacey fixes the pothole.

When Emma gives Brent flack over his coffee drinking, he vows to quit cold turkey if she quits knitting; as Brent struggles in a caffeine free world, Emma takes up a new pastime.

Brent and the citizens of Dog River are annoyed when Lacey tries to make them eat local; Davis tries to train bees; Wanda sells homemade candles.

Wanda and Lacey entice the residents of Dog River with clickbait texts, while Oscar sets up a bait shop across the street from Corner Gas to teach Brent a business lesson; Davis and Karen involve Hank in a training exercise with chaotic results.

Unsuspecting taxi cab passengers answer trivia questions posed by host Ben Bailey; the passengers may reach their destination with cold hard cash or walk away empty-handed.

This gang is stoked to find out that they have entered the Cash Cab, bur they get a strike early in the game.

Hank's premonitions freak Wanda out; Lacey fixes the pothole.

When Emma gives Brent flack over his coffee drinking, he vows to quit cold turkey if she quits knitting; as Brent struggles in a caffeine free world, Emma takes up a new pastime.

Brent and the citizens of Dog River are annoyed when Lacey tries to make them eat local; Davis tries to train bees; Wanda sells homemade candles.

Wanda and Lacey entice the residents of Dog River with clickbait texts, while Oscar sets up a bait shop across the street from Corner Gas to teach Brent a business lesson; Davis and Karen involve Hank in a training exercise with chaotic results.

Dan and Louise take their relationship to the next level and come to appreciate the complexities of aging; Darlene spends the night in jail and leaves parenting duties to Ben; Mark and a friend's class experiment leaves them both with hickeys.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

The six friends prepare to say goodbye and embark on the next chapters of their lives; momentous events and last-minute surprises.

Monica's high-school friend visits after leaving her fiancé at the altar.

Monica begins to feel the heat when she prepares dinner for her parents (Elliott Gould, Christina Pickles).

Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.

Dan and Louise take their relationship to the next level and come to appreciate the complexities of aging; Darlene spends the night in jail and leaves parenting duties to Ben; Mark and a friend's class experiment leaves them both with hickeys.

Darlene and Ben go apartment hunting; Jackie and Becky take Beverly Rose on a road trip to Mexico to meet her father for the first time; Dan reluctantly shares his financial troubles with Louise.

Monica finds it difficult to break up with her latest boyfriend (Geoffrey Lower), whom everyone likes; Chandler starts smoking again; Phoebe receives a large sum of money.

While the men attend a hockey game and end up at a hospital, the women spy on President Clinton's top aide, George Stephanopoulos, who lives across the street.

Chandler and Phoebe plan to dump dates on the same night at the same coffee house.

An agent (June Gable) offers Joey a movie role as Al Pacino's naked body double; Chandler dates a liberal woman (Sofia Milos).

Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.

Raj designs a scavenger hunt that brings out the best - and the worst - in the whole gang.

Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.

Darlene and Ben go apartment hunting; Jackie and Becky take Beverly Rose on a road trip to Mexico to meet her father for the first time; Dan reluctantly shares his financial troubles with Louise.

Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons"; Lucy and Koothrappali have an awkward date.

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.

Raj designs a scavenger hunt that brings out the best - and the worst - in the whole gang.

Monica finds it difficult to break up with her latest boyfriend (Geoffrey Lower), whom everyone likes; Chandler starts smoking again; Phoebe receives a large sum of money.

While the men attend a hockey game and end up at a hospital, the women spy on President Clinton's top aide, George Stephanopoulos, who lives across the street.

Chandler and Phoebe plan to dump dates on the same night at the same coffee house.

An agent (June Gable) offers Joey a movie role as Al Pacino's naked body double; Chandler dates a liberal woman (Sofia Milos).

Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.

Raj designs a scavenger hunt that brings out the best - and the worst - in the whole gang.

Dan and Louise take their relationship to the next level and come to appreciate the complexities of aging; Darlene spends the night in jail and leaves parenting duties to Ben; Mark and a friend's class experiment leaves them both with hickeys.

Darlene and Ben go apartment hunting; Jackie and Becky take Beverly Rose on a road trip to Mexico to meet her father for the first time; Dan reluctantly shares his financial troubles with Louise.

Karen buys a new breathalyzer machine; Lacey puts up a new bulletin board.

Hank is being outwitted by a dog; Brent and Lacy create travel mugs for souvenirs.

The sewer system backs up and causes chaos; Emma tries to trick Oscar into getting an updated family portrait.

Hank and Oscar team up to build a shelter for the apocalypse and Davis, Karen and Wanda argue over who would be the best leader; Emma traps Brent and Lacey in the cellar so they can hash things out.

Mike isn't quite sure what the Cash Cab is when he enters Adam's taxi; once Nicole and Stephanie explain, they had him at "cash.".

Stephanie, Adam and Catherine are super enthusiastic about the chance to show off their trivia skills in the Cash Cab.

Karen buys a new breathalyzer machine; Lacey puts up a new bulletin board.

Hank is being outwitted by a dog; Brent and Lacy create travel mugs for souvenirs.

The sewer system backs up and causes chaos; Emma tries to trick Oscar into getting an updated family portrait.

Hank and Oscar team up to build a shelter for the apocalypse and Davis, Karen and Wanda argue over who would be the best leader; Emma traps Brent and Lacey in the cellar so they can hash things out.

Mike isn't quite sure what the Cash Cab is when he enters Adam's taxi; once Nicole and Stephanie explain, they had him at "cash.".

Stephanie, Adam and Catherine are super enthusiastic about the chance to show off their trivia skills in the Cash Cab.

Karen buys a new breathalyzer machine; Lacey puts up a new bulletin board.

Hank is being outwitted by a dog; Brent and Lacy create travel mugs for souvenirs.

The sewer system backs up and causes chaos; Emma tries to trick Oscar into getting an updated family portrait.

Hank and Oscar team up to build a shelter for the apocalypse and Davis, Karen and Wanda argue over who would be the best leader; Emma traps Brent and Lacey in the cellar so they can hash things out.

The Conners share their differing takes on why they all think everyone should vote; Louise gets an opportunity that might send her away from Lanford, prompting the family to interfere in Dan's complicated relationship.

Monica finds it difficult to break up with her latest boyfriend (Geoffrey Lower), whom everyone likes; Chandler starts smoking again; Phoebe receives a large sum of money.

While the men attend a hockey game and end up at a hospital, the women spy on President Clinton's top aide, George Stephanopoulos, who lives across the street.

Chandler and Phoebe plan to dump dates on the same night at the same coffee house.

An agent (June Gable) offers Joey a movie role as Al Pacino's naked body double; Chandler dates a liberal woman (Sofia Milos).

Sheldon wants revenge after Amy ruins one of his favorite films; Leonard finds a way to get Penny to do anything; Stuart and Raj make online dating profiles.

Sheldon and Amy's relationship is tested when she takes a job at his university; a fight with Bernadette leaves Howard sleeping on Raj's couch.

Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.

The Conners share their differing takes on why they all think everyone should vote; Louise gets an opportunity that might send her away from Lanford, prompting the family to interfere in Dan's complicated relationship.

The Conners are dealing with the pandemic and life's financial troubles; the Lunch Box is closed for everything but takeout and delivery; Becky and Darlene are both forced to search for additional income at the newly reopened Wellman Plastics plant.

Sheldon studies his family for a psychology project; a Thanksgiving dinner turns into a family fight when George Sr. is offered a job in Oklahoma.

When Sheldon learns that people with stunted childhoods can turn into social outcasts, he tries to act like a kid; Meemaw and Dr. Sturgis' relationship is tested when she teaches him how to drive.

Sheldon experiments on Missy; Georgie joins Mary's bible study to spend more time with his crush, Veronica.

When Sheldon has to spend a few days in the hospital, he turns into the world's worst patient; Missy gets a taste of what life would be like without her twin.

Sheldon wants revenge after Amy ruins one of his favorite films; Leonard finds a way to get Penny to do anything; Stuart and Raj make online dating profiles.

Sheldon and Amy's relationship is tested when she takes a job at his university; a fight with Bernadette leaves Howard sleeping on Raj's couch.

When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.

When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.

Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.

The Conners are dealing with the pandemic and life's financial troubles; the Lunch Box is closed for everything but takeout and delivery; Becky and Darlene are both forced to search for additional income at the newly reopened Wellman Plastics plant.

Sheldon wants revenge after Amy ruins one of his favorite films; Leonard finds a way to get Penny to do anything; Stuart and Raj make online dating profiles.

Sheldon and Amy's relationship is tested when she takes a job at his university; a fight with Bernadette leaves Howard sleeping on Raj's couch.

Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.

When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.

Sheldon studies his family for a psychology project; a Thanksgiving dinner turns into a family fight when George Sr. is offered a job in Oklahoma.

When Sheldon learns that people with stunted childhoods can turn into social outcasts, he tries to act like a kid; Meemaw and Dr. Sturgis' relationship is tested when she teaches him how to drive.

Sheldon experiments on Missy; Georgie joins Mary's bible study to spend more time with his crush, Veronica.

When Sheldon has to spend a few days in the hospital, he turns into the world's worst patient; Missy gets a taste of what life would be like without her twin.

When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.

When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.

The Conners share their differing takes on why they all think everyone should vote; Louise gets an opportunity that might send her away from Lanford, prompting the family to interfere in Dan's complicated relationship.

The Conners are dealing with the pandemic and life's financial troubles; the Lunch Box is closed for everything but takeout and delivery; Becky and Darlene are both forced to search for additional income at the newly reopened Wellman Plastics plant.

Brent's annual trip to exotic locales stirs jealousy; Oscar experiments with e-mail.

Lacey wants to start a running club; Hank's new crossing guard job.

Brent and Hank battle to take back their childhood tree house; Oscar's in denial.

Brent purchases a new digital camera; trivia showdown; Oscar is haunted by a ceramic gnome.

Sharon and Michelann are two classy dames in the Cash Cab who surprise everyone with their crazy energy.

Rachael, Kaya and Anna are three beauties who find themselves in the Cash Cab with their friend Aaron; Aaron comes through.

Brent's annual trip to exotic locales stirs jealousy; Oscar experiments with e-mail.

Lacey wants to start a running club; Hank's new crossing guard job.

Brent and Hank battle to take back their childhood tree house; Oscar's in denial.

Brent purchases a new digital camera; trivia showdown; Oscar is haunted by a ceramic gnome.

Sharon and Michelann are two classy dames in the Cash Cab who surprise everyone with their crazy energy.

Rachael, Kaya and Anna are three beauties who find themselves in the Cash Cab with their friend Aaron; Aaron comes through.

Brent's annual trip to exotic locales stirs jealousy; Oscar experiments with e-mail.

Lacey wants to start a running club; Hank's new crossing guard job.

Brent and Hank battle to take back their childhood tree house; Oscar's in denial.

Brent purchases a new digital camera; trivia showdown; Oscar is haunted by a ceramic gnome.

Mary is devastated that Halloween has been canceled by the city, so Darlene and Becky enlist Jackie and the rest of the family to create an unforgettable experience; Mark goes toe-to-toe with a kid at school who doesn't believe in wearing a mask.

Sheldon studies his family for a psychology project; a Thanksgiving dinner turns into a family fight when George Sr. is offered a job in Oklahoma.

When Sheldon learns that people with stunted childhoods can turn into social outcasts, he tries to act like a kid; Meemaw and Dr. Sturgis' relationship is tested when she teaches him how to drive.

Sheldon experiments on Missy; Georgie joins Mary's bible study to spend more time with his crush, Veronica.

When Sheldon has to spend a few days in the hospital, he turns into the world's worst patient; Missy gets a taste of what life would be like without her twin.

When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests; Leonard and Penny deal with an error from her past.

Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.

As Leonard tries to help Penny with a disappointment, Penny asks him a bold question about their relationship; Sheldon wants to learn how to be funny.

Mary is devastated that Halloween has been canceled by the city, so Darlene and Becky enlist Jackie and the rest of the family to create an unforgettable experience; Mark goes toe-to-toe with a kid at school who doesn't believe in wearing a mask.

Darlene isolates herself from her co-workers at Wellman Plastics, leaving them with the impression she is an elitist snob; Louise decides to teach Harris an expensive life lesson; Jackie is determined to keep the restaurant running.

Sheldon attempts to build a nuclear reactor; a university cocktail party gets heated when Dr. Sturgis' colleague flirts with Meemaw; Georgie is heartbroken when he learns Veronica has a boyfriend.

Sheldon uses his new friendship with the school bully to boss Georgie around; Missy steals Meemaw's makeup for picture day.

Sheldon and Dr. Sturgis have their first fight when Dr. Sturgis marks an answer wrong on Sheldon's test; Mary takes over for Pastor Jeff when he's out sick.

Things spiral out of control when Sheldon boycotts his favorite bread company; Georgie offers Veronica a shoulder to cry on when she's dumped by her boyfriend.

When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests; Leonard and Penny deal with an error from her past.

Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.

Sheldon must learn how to relax when he is forced to take a vacation; Leonard tries to support Penny when she quits her job; Bernadette needs to replace one of Stuart's comic books.

Unable to get Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild evening with James Earl Jones; the ladies try to act maturely.

Julian sends Ricky and Lahey on a golf outing, which leads to a confrontation; Nathan MacKinnon visits kids at the hockey school.

Attracted by a sign offering "free weed," a bunch of stoners are drawn to the shipping container where the boys take on Lahey, Randy and two police officers.

When the gang decides to spend Thanksgiving at Mrs. Wolowitz's house, Sheldon protests; Leonard and Penny deal with an error from her past.

Amy and Leonard try to help Sheldon deal with his shame; Raj stays with Bernadette and Howard for a week.

As Leonard tries to help Penny with a disappointment, Penny asks him a bold question about their relationship; Sheldon wants to learn how to be funny.

Unable to get Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild evening with James Earl Jones; the ladies try to act maturely.

Julian sends Ricky and Lahey on a golf outing, which leads to a confrontation; Nathan MacKinnon visits kids at the hockey school.

Attracted by a sign offering "free weed," a bunch of stoners are drawn to the shipping container where the boys take on Lahey, Randy and two police officers.

Sheldon and Dr. Sturgis have their first fight when Dr. Sturgis marks an answer wrong on Sheldon's test; Mary takes over for Pastor Jeff when he's out sick.

Things spiral out of control when Sheldon boycotts his favorite bread company; Georgie offers Veronica a shoulder to cry on when she's dumped by her boyfriend.

Sheldon must learn how to relax when he is forced to take a vacation; Leonard tries to support Penny when she quits her job; Bernadette needs to replace one of Stuart's comic books.

Unable to get Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild evening with James Earl Jones; the ladies try to act maturely.

Mary is devastated that Halloween has been canceled by the city, so Darlene and Becky enlist Jackie and the rest of the family to create an unforgettable experience; Mark goes toe-to-toe with a kid at school who doesn't believe in wearing a mask.

Darlene isolates herself from her co-workers at Wellman Plastics, leaving them with the impression she is an elitist snob; Louise decides to teach Harris an expensive life lesson; Jackie is determined to keep the restaurant running.

Oscar tries to fix a roof; Brent and Karen write a kid's book on bike safety.

Brent fears he is losing his hair; Wanda gets a new lamp and has to fight to keep it.

Lacey starts a coffee shop newsletter; Oscar's childhood dream.

Lacey's friend Connie comes to Dog River; Davis thinks Karen would make a bad undercover cop.

It's Dog River's 100th birthday and Hank wants to pay tribute by building a scale model of the town using Lego blocks; like any artist, he demands perfection.

Davis shapes up; Brent and Lacey compete to get a secret from Karen.

Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life; Bernadette is torn when Wolowitz gets the chance to go back to space.

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer; Raj wants Amy to write to a woman on his behalf.

Sheldon is faced with a new reality when he visits his mom in Houston; a murder mystery party starts arguments.

Raj struggles with guilt when he dates two women at once; Penny has a chance to play a part in a cheesy movie; Sheldon is torn between two gaming systems.

Sheldon has a personal crisis when he decides string theory is a waste of his time; a double date ends in embarrassment for Howard.

Sheldon gives spontaneity a try, which causes unexpected friction for Penny, Bernadette and Amy; Raj asks Howard for help with preparation for a date with Emily.

Professor Proton (Bob Newhart) helps Sheldon deal with grief; Leonard gets into a competition with Penny; Bernadette and Amy prepare a "Star Wars Day" gift for the guys.

A bad day compels Penny to re-evaluate her choices - including Leonard; Bernadette and Howard must care for Mrs. Wolowitz; Sheldon gives Raj advice on relationships.

Faced with an uncertain future, Sheldon considers a major change; Emily and Raj decide to take things to the next level.

Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny interviews for a job at Bernadette's company; Stuart's relationship with Mrs. Wolowitz disturbs Howard.

When Sheldon must teach a class, Howard decides to take it; Amy takes advantage of the tension between Penny and Bernadette.

Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game; Penny and Leonard want to prove Sheldon wrong after he says he and Amy are the better couple.

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny; the guys think about becoming part owners in Stuart's store.

Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life; Bernadette is torn when Wolowitz gets the chance to go back to space.

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer; Raj wants Amy to write to a woman on his behalf.

Sheldon is faced with a new reality when he visits his mom in Houston; a murder mystery party starts arguments.

Raj struggles with guilt when he dates two women at once; Penny has a chance to play a part in a cheesy movie; Sheldon is torn between two gaming systems.

Sheldon has a personal crisis when he decides string theory is a waste of his time; a double date ends in embarrassment for Howard.

Sheldon gives spontaneity a try, which causes unexpected friction for Penny, Bernadette and Amy; Raj asks Howard for help with preparation for a date with Emily.

Professor Proton (Bob Newhart) helps Sheldon deal with grief; Leonard gets into a competition with Penny; Bernadette and Amy prepare a "Star Wars Day" gift for the guys.

A bad day compels Penny to re-evaluate her choices - including Leonard; Bernadette and Howard must care for Mrs. Wolowitz; Sheldon gives Raj advice on relationships.

Faced with an uncertain future, Sheldon considers a major change; Emily and Raj decide to take things to the next level.

Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny interviews for a job at Bernadette's company; Stuart's relationship with Mrs. Wolowitz disturbs Howard.

When Sheldon must teach a class, Howard decides to take it; Amy takes advantage of the tension between Penny and Bernadette.

Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game; Penny and Leonard want to prove Sheldon wrong after he says he and Amy are the better couple.

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny; the guys think about becoming part owners in Stuart's store.

Sheldon and Amy go on a trip to wine country with Howard and Bernadette; Penny and Leonard rush Raj's dog to the vet.

When Leonard buys a dining room table, Sheldon re-evaluates the changes in his life; Bernadette is torn when Wolowitz gets the chance to go back to space.

Bernadette tries to negotiate peace between Sheldon and Wolowitz; Penny receives an embarrassing offer; Raj wants Amy to write to a woman on his behalf.

Sheldon is faced with a new reality when he visits his mom in Houston; a murder mystery party starts arguments.

Raj struggles with guilt when he dates two women at once; Penny has a chance to play a part in a cheesy movie; Sheldon is torn between two gaming systems.

Sheldon has a personal crisis when he decides string theory is a waste of his time; a double date ends in embarrassment for Howard.

Sheldon gives spontaneity a try, which causes unexpected friction for Penny, Bernadette and Amy; Raj asks Howard for help with preparation for a date with Emily.

Professor Proton (Bob Newhart) helps Sheldon deal with grief; Leonard gets into a competition with Penny; Bernadette and Amy prepare a "Star Wars Day" gift for the guys.

A bad day compels Penny to re-evaluate her choices - including Leonard; Bernadette and Howard must care for Mrs. Wolowitz; Sheldon gives Raj advice on relationships.

Faced with an uncertain future, Sheldon considers a major change; Emily and Raj decide to take things to the next level.

Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny interviews for a job at Bernadette's company; Stuart's relationship with Mrs. Wolowitz disturbs Howard.

When Sheldon must teach a class, Howard decides to take it; Amy takes advantage of the tension between Penny and Bernadette.

Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game; Penny and Leonard want to prove Sheldon wrong after he says he and Amy are the better couple.

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny; the guys think about becoming part owners in Stuart's store.

Brent enters into a long-term relationship; Wanda's telescope.

A simple jar of jellybeans turns Dog River's park from a dilapidated local hazard into full-blown scandal.

Brent helps Lacey buy a new car; Karen and Davis try to break the idea of cops in donut shops.

A simple jar of jellybeans turns Dog River's park from a dilapidated local hazard into full-blown scandal.

Brent helps Lacey buy a new car; Karen and Davis try to break the idea of cops in donut shops.

Karen is upset when Emma cuts Brent's hair; Hank promises to stain Lacey's deck.

Chandler finds himself trapped in an ATM vestibule with model Jill Goodacre during a city-wide power failure.

Monica and Ross share their feelings about death and their grandmother.

Monica and Ross cook Thanksgiving dinner for themselves, but everyone else shows up.

The friends renege on a promise not to bring dates to their New Year's Eve party.

Chandler learns details about his mother's (Morgan Fairchild) life when she appears on national television.

Rachel's Italian boyfriend tries to seduce Phoebe; Rachel accidentally reveals a secret to Ross; Monica's aunt refuses to take the lasagnas she ordered.

Phoebe's psychiatrist boyfriend (Fisher Stevens) annoys her friends with his analyses of their lives.

It's Valentine's Day and, out on his first date in nine years, Ross meets up with his ex-wife; Monica, Phoebe and Rachel rebel against the spirit of the day by burning mementos of past relationships.

A "high-spirited" restaurant owner wolfs down the gourmet meal Monica created as part of a job interview.

Joey asks Phoebe's sister (Lisa Kudrow in a dual role) on a date; Ross takes Lamaze classes with Carol (Jane Sibbett) and Susan (Jessica Hecht).

Monica takes Rachel to the hospital; Ross asks his dad (Elliott Gould) for advice on becoming a father.

When the girls lose money to the guys in a poker match they seek out Monica's Aunt Iris, a famous card player, for lessons and then demand a rematch.

Rachel accidentally lets Ross' pet monkey escape, and the friends form a search party; she is then horrified to learn that her former best friend is engaged to her ex-fiance.

Rachel is asked to be the maid of honor in her ex-fiance's (Mitchell Whitfield) wedding.

Chandler finds himself trapped in an ATM vestibule with model Jill Goodacre during a city-wide power failure.

Monica and Ross share their feelings about death and their grandmother.

Monica and Ross cook Thanksgiving dinner for themselves, but everyone else shows up.

The friends renege on a promise not to bring dates to their New Year's Eve party.

Chandler learns details about his mother's (Morgan Fairchild) life when she appears on national television.

Rachel's Italian boyfriend tries to seduce Phoebe; Rachel accidentally reveals a secret to Ross; Monica's aunt refuses to take the lasagnas she ordered.

Phoebe's psychiatrist boyfriend (Fisher Stevens) annoys her friends with his analyses of their lives.

It's Valentine's Day and, out on his first date in nine years, Ross meets up with his ex-wife; Monica, Phoebe and Rachel rebel against the spirit of the day by burning mementos of past relationships.

A "high-spirited" restaurant owner wolfs down the gourmet meal Monica created as part of a job interview.

Joey asks Phoebe's sister (Lisa Kudrow in a dual role) on a date; Ross takes Lamaze classes with Carol (Jane Sibbett) and Susan (Jessica Hecht).

Monica takes Rachel to the hospital; Ross asks his dad (Elliott Gould) for advice on becoming a father.

When the girls lose money to the guys in a poker match they seek out Monica's Aunt Iris, a famous card player, for lessons and then demand a rematch.

Rachel accidentally lets Ross' pet monkey escape, and the friends form a search party; she is then horrified to learn that her former best friend is engaged to her ex-fiance.

Rachel is asked to be the maid of honor in her ex-fiance's (Mitchell Whitfield) wedding.

Chandler finds himself trapped in an ATM vestibule with model Jill Goodacre during a city-wide power failure.

Monica and Ross share their feelings about death and their grandmother.

Monica and Ross cook Thanksgiving dinner for themselves, but everyone else shows up.

The friends renege on a promise not to bring dates to their New Year's Eve party.

Chandler learns details about his mother's (Morgan Fairchild) life when she appears on national television.

Rachel's Italian boyfriend tries to seduce Phoebe; Rachel accidentally reveals a secret to Ross; Monica's aunt refuses to take the lasagnas she ordered.

Phoebe's psychiatrist boyfriend (Fisher Stevens) annoys her friends with his analyses of their lives.

It's Valentine's Day and, out on his first date in nine years, Ross meets up with his ex-wife; Monica, Phoebe and Rachel rebel against the spirit of the day by burning mementos of past relationships.

A "high-spirited" restaurant owner wolfs down the gourmet meal Monica created as part of a job interview.

Joey asks Phoebe's sister (Lisa Kudrow in a dual role) on a date; Ross takes Lamaze classes with Carol (Jane Sibbett) and Susan (Jessica Hecht).

Monica takes Rachel to the hospital; Ross asks his dad (Elliott Gould) for advice on becoming a father.

When the girls lose money to the guys in a poker match they seek out Monica's Aunt Iris, a famous card player, for lessons and then demand a rematch.

Rachel accidentally lets Ross' pet monkey escape, and the friends form a search party; she is then horrified to learn that her former best friend is engaged to her ex-fiance.

Rachel is asked to be the maid of honor in her ex-fiance's (Mitchell Whitfield) wedding.

When a morning radio DJ impersonates Brent on his show, he goes out of his way to prove it's not him; Lacey is upset with her delivery service.

Oscar and Emma argue over the room temperature; Karen makes Lacey regret disobeying a local yield sign.

Spaghetti from a pocket, a taste of engine oil for a cop, and a child that reappears.

A cop eats trash doughnuts, a paramedic loves a dummy and a magician steals cash!

Zach, Jaco and Grace are a group of mathematicians in the Cash Cab; a cameo appearance from Chester the Bike.

Vince, Breanne, Pamela and Josefine are an international team familiar with "Cash Cab.".

When a morning radio DJ impersonates Brent on his show, he goes out of his way to prove it's not him; Lacey is upset with her delivery service.

Oscar and Emma argue over the room temperature; Karen makes Lacey regret disobeying a local yield sign.

Spaghetti from a pocket, a taste of engine oil for a cop, and a child that reappears.

A cop eats trash doughnuts, a paramedic loves a dummy and a magician steals cash!

Zach, Jaco and Grace are a group of mathematicians in the Cash Cab; a cameo appearance from Chester the Bike.

Vince, Breanne, Pamela and Josefine are an international team familiar with "Cash Cab.".

When a morning radio DJ impersonates Brent on his show, he goes out of his way to prove it's not him; Lacey is upset with her delivery service.

Oscar and Emma argue over the room temperature; Karen makes Lacey regret disobeying a local yield sign.

Spaghetti from a pocket, a taste of engine oil for a cop, and a child that reappears.

A cop eats trash doughnuts, a paramedic loves a dummy and a magician steals cash!

It's Beverly Rose's first birthday, but it's not all cake and candles as Becky and Emilio disagree on what kind of party they should have; Jackie is introduced to someone who wants to be more than friends.

There's no sound, but there sure are plenty of laughs. This crazy Quebec-based troupe uses the city as its stage, and its inhabitants, or victims, as characters! People are caught in a twisted yet funny web of comedic deception. This updated "Candid Camera" is a tad more risque and a little kookier with its practical jokes. The little snippets last only a few minutes, and some look more painful than others.

There's no sound, but there sure are plenty of laughs. This crazy Quebec-based troupe uses the city as its stage, and its inhabitants, or victims, as characters! People are caught in a twisted yet funny web of comedic deception. This updated "Candid Camera" is a tad more risque and a little kookier with its practical jokes. The little snippets last only a few minutes, and some look more painful than others.

There's no sound, but there sure are plenty of laughs. This crazy Quebec-based troupe uses the city as its stage, and its inhabitants, or victims, as characters! People are caught in a twisted yet funny web of comedic deception. This updated "Candid Camera" is a tad more risque and a little kookier with its practical jokes. The little snippets last only a few minutes, and some look more painful than others.

There's no sound, but there sure are plenty of laughs. This crazy Quebec-based troupe uses the city as its stage, and its inhabitants, or victims, as characters! People are caught in a twisted yet funny web of comedic deception. This updated "Candid Camera" is a tad more risque and a little kookier with its practical jokes. The little snippets last only a few minutes, and some look more painful than others.

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill; the guys try to invent the next big thing.

Raj and Sheldon try to simulate a dark-matter research expedition; after a fight about money, Penny and Leonard turn to Bernadette and Wolowitz for advice.

The guys try to help when Penny is faced with an awkward dilemma at work; Bernadette and Amy discuss sexuality and female scientists.

It's Beverly Rose's first birthday, but it's not all cake and candles as Becky and Emilio disagree on what kind of party they should have; Jackie is introduced to someone who wants to be more than friends.

Darlene's friendship with a manager at Wellman Plastics lands her in an awkward situation; Louise's brother tries to win over Jackie by making a thoughtful gesture, creating uncomfortable tension.

In an effort to spend more time with Carrie, Doug hires someone (Nicole Sullivan) to take Arthur for a walk three times a week.

Doug uses a two-for-one coupon to give Carrie a gift of corneal surgery which results in her temporary blindness.

Doug prepares to break the record for the most consecutive deliveries without incident; Arthur asks Holly to play in Scrabble tournament.

Doug and Carrie's friendship with Deacon and Kelly is tested after Doug is distracted and backs into their car.

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill; the guys try to invent the next big thing.

Raj and Sheldon try to simulate a dark-matter research expedition; after a fight about money, Penny and Leonard turn to Bernadette and Wolowitz for advice.

Sheldon feels pressured to participate in romantic traditions when the gang re-creates a high-school prom on the roof.

S.T.C is invited to a convention, but learns it is a trap sprung by a man intent on killing Bryan Adams; The Anne of Green Gables museum is under attack.

The guys try to help when Penny is faced with an awkward dilemma at work; Bernadette and Amy discuss sexuality and female scientists.

Darlene's friendship with a manager at Wellman Plastics lands her in an awkward situation; Louise's brother tries to win over Jackie by making a thoughtful gesture, creating uncomfortable tension.

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill; the guys try to invent the next big thing.

Raj and Sheldon try to simulate a dark-matter research expedition; after a fight about money, Penny and Leonard turn to Bernadette and Wolowitz for advice.

The guys try to help when Penny is faced with an awkward dilemma at work; Bernadette and Amy discuss sexuality and female scientists.

S.T.C is invited to a convention, but learns it is a trap sprung by a man intent on killing Bryan Adams; The Anne of Green Gables museum is under attack.

In an effort to spend more time with Carrie, Doug hires someone (Nicole Sullivan) to take Arthur for a walk three times a week.

Doug uses a two-for-one coupon to give Carrie a gift of corneal surgery which results in her temporary blindness.

Doug prepares to break the record for the most consecutive deliveries without incident; Arthur asks Holly to play in Scrabble tournament.

Doug and Carrie's friendship with Deacon and Kelly is tested after Doug is distracted and backs into their car.

Sheldon feels pressured to participate in romantic traditions when the gang re-creates a high-school prom on the roof.

S.T.C is invited to a convention, but learns it is a trap sprung by a man intent on killing Bryan Adams; The Anne of Green Gables museum is under attack.

It's Beverly Rose's first birthday, but it's not all cake and candles as Becky and Emilio disagree on what kind of party they should have; Jackie is introduced to someone who wants to be more than friends.

Darlene's friendship with a manager at Wellman Plastics lands her in an awkward situation; Louise's brother tries to win over Jackie by making a thoughtful gesture, creating uncomfortable tension.

Brent and Lacey mentor high school students; Emma decides to be nicer to Oscar.

Brent helps Hank tear down a barn; Emma receives multiple manicures; David hires Wanda to snap pictures of him working.

Hank and Brent restore a vintage car; Karen deals with a stray cat; Emma and Lacey paint over some graffiti.

Hank accidentally punches Brent, and it is agreed that Brent can punch him back.

Andrew, Jason, Troy and Steve are four snappy dressers who end up in the Cash Cab.

After an amusing entrance, Tim and Andrea feel it's their destiny that they managed to hail the Cash Cab.

Brent and Lacey mentor high school students; Emma decides to be nicer to Oscar.

Brent helps Hank tear down a barn; Emma receives multiple manicures; David hires Wanda to snap pictures of him working.

Hank and Brent restore a vintage car; Karen deals with a stray cat; Emma and Lacey paint over some graffiti.

Hank accidentally punches Brent, and it is agreed that Brent can punch him back.

Andrew, Jason, Troy and Steve are four snappy dressers who end up in the Cash Cab.

After an amusing entrance, Tim and Andrea feel it's their destiny that they managed to hail the Cash Cab.

Brent and Lacey mentor high school students; Emma decides to be nicer to Oscar.

Brent helps Hank tear down a barn; Emma receives multiple manicures; David hires Wanda to snap pictures of him working.

Hank and Brent restore a vintage car; Karen deals with a stray cat; Emma and Lacey paint over some graffiti.

Hank accidentally punches Brent, and it is agreed that Brent can punch him back.

Harris' job is in jeopardy after joining a protest she strongly believes in, leading to tense discussions within the family; Jackie makes a visit to Wellman Plastics only to realize the company is instituting supervised drug testing.

In an effort to spend more time with Carrie, Doug hires someone (Nicole Sullivan) to take Arthur for a walk three times a week.

Doug uses a two-for-one coupon to give Carrie a gift of corneal surgery which results in her temporary blindness.

Doug prepares to break the record for the most consecutive deliveries without incident; Arthur asks Holly to play in Scrabble tournament.

Doug and Carrie's friendship with Deacon and Kelly is tested after Doug is distracted and backs into their car.

Leonard has minor surgery on his nose, causing Sheldon to overreact; Bernadette and Howard work on their marriage.

Sheldon says goodbye to Fun With Flags; Howard, Leonard and Raj look through their dead professor's research; Bernadette learns her co-workers' true feelings.

When the guys agree to do something the girls like, Sheldon and Leonard end up having a confrontation.

Harris' job is in jeopardy after joining a protest she strongly believes in, leading to tense discussions within the family; Jackie makes a visit to Wellman Plastics only to realize the company is instituting supervised drug testing.

Ben's mom arrives after an unexpected death and unveils shocking information from the past; Becky and Emilio spend more time together.

Monica, Rachel and Phoebe go on a covert operation to track down the woman who stole Monica's credit card.

Monica's new boyfriend (Stan Kirsch) exposes his own secret after she admits her true age.

When Carol gives birth, Ross and Susan almost miss the event; Joey befriends an unmarried pregnant woman.

Rachel discovers Ross' feelings for her when he goes out of town on a business trip.

Leonard has minor surgery on his nose, causing Sheldon to overreact; Bernadette and Howard work on their marriage.

Sheldon says goodbye to Fun With Flags; Howard, Leonard and Raj look through their dead professor's research; Bernadette learns her co-workers' true feelings.

Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough; Wolowitz invents a game about Raj.

Sheldon and Leonard must defend themselves from an online bully's criticism after they co-publish a paper; Bernadette, Penny and Amy confront embarrassing moments during a girls night.

When the guys agree to do something the girls like, Sheldon and Leonard end up having a confrontation.

Ben's mom arrives after an unexpected death and unveils shocking information from the past; Becky and Emilio spend more time together.

Leonard has minor surgery on his nose, causing Sheldon to overreact; Bernadette and Howard work on their marriage.

Sheldon says goodbye to Fun With Flags; Howard, Leonard and Raj look through their dead professor's research; Bernadette learns her co-workers' true feelings.

When the guys agree to do something the girls like, Sheldon and Leonard end up having a confrontation.

Sheldon and Leonard must defend themselves from an online bully's criticism after they co-publish a paper; Bernadette, Penny and Amy confront embarrassing moments during a girls night.

Monica, Rachel and Phoebe go on a covert operation to track down the woman who stole Monica's credit card.

Monica's new boyfriend (Stan Kirsch) exposes his own secret after she admits her true age.

When Carol gives birth, Ross and Susan almost miss the event; Joey befriends an unmarried pregnant woman.

Rachel discovers Ross' feelings for her when he goes out of town on a business trip.

Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough; Wolowitz invents a game about Raj.

Sheldon and Leonard must defend themselves from an online bully's criticism after they co-publish a paper; Bernadette, Penny and Amy confront embarrassing moments during a girls night.

Harris' job is in jeopardy after joining a protest she strongly believes in, leading to tense discussions within the family; Jackie makes a visit to Wellman Plastics only to realize the company is instituting supervised drug testing.

Ben's mom arrives after an unexpected death and unveils shocking information from the past; Becky and Emilio spend more time together.

Davis is locked in a jail cell to raise money for charity; Wanda tries to install a toilet.

Karen prepares an eyewitness testimony; Hank tries becoming a rodeo clown.

Lacey tries to get a photo of a blue moon sunrise with Brent, but it turns awkward; Hank is suspicious about Oscar being nice to Emma; Davis and Wanda argue about a new book.

Lacey is frustrated with the new party planning methods; Wanda convinces Brent and Hank to take high school tests to see who is smarter.

Brie, Kara and Robin are three sassy girls who bop into the Cash Cab; they recognize Adam right away.

Anthony, Frank and Andrew are three buddies feeling confident in the Cash Cab; they make it to their destination.

Davis is locked in a jail cell to raise money for charity; Wanda tries to install a toilet.

Karen prepares an eyewitness testimony; Hank tries becoming a rodeo clown.

Lacey tries to get a photo of a blue moon sunrise with Brent, but it turns awkward; Hank is suspicious about Oscar being nice to Emma; Davis and Wanda argue about a new book.

Lacey is frustrated with the new party planning methods; Wanda convinces Brent and Hank to take high school tests to see who is smarter.

Brie, Kara and Robin are three sassy girls who bop into the Cash Cab; they recognize Adam right away.

Anthony, Frank and Andrew are three buddies feeling confident in the Cash Cab; they make it to their destination.

Davis is locked in a jail cell to raise money for charity; Wanda tries to install a toilet.

Karen prepares an eyewitness testimony; Hank tries becoming a rodeo clown.

Lacey tries to get a photo of a blue moon sunrise with Brent, but it turns awkward; Hank is suspicious about Oscar being nice to Emma; Davis and Wanda argue about a new book.

Lacey is frustrated with the new party planning methods; Wanda convinces Brent and Hank to take high school tests to see who is smarter.

Harris brings home her new friend, Josh, leaving the family questioning his intentions; Becky and Ben's attempt to build a closet stirs up family drama.

Monica, Rachel and Phoebe go on a covert operation to track down the woman who stole Monica's credit card.

Monica's new boyfriend (Stan Kirsch) exposes his own secret after she admits her true age.

When Carol gives birth, Ross and Susan almost miss the event; Joey befriends an unmarried pregnant woman.

Rachel discovers Ross' feelings for her when he goes out of town on a business trip.

While the gang waits for the reopening of Stuart's comic book store Wolowitz gets some shocking news; Penny has trouble taking her own advice; Leonard and Raj think they spot Nathan Fillion at a restaurant.

Penny and Sheldon design an experiment - as a joke - to make participants fall in love; Howard and Bernadette get into trouble at the airport.

Amy finds out that Sheldon applied for a one-way mission to colonize Mars; a trip to the pet store leads to a fight; Leonard has a surprise for Penny; Raj is busted while snooping in Emily's apartment.

Harris brings home her new friend, Josh, leaving the family questioning his intentions; Becky and Ben's attempt to build a closet stirs up family drama.

Darlene earns a promotion at Wellman Plastics; Ben decides on a new career path; Jackie tries a herbal tea, and it leads to an emotional revelation.

Rachel decides to look up her former boyfriend (Cosimo Fusco) when she is distraught over Ross' new girlfriend (Lauren Tom).

While tending his son, Ross expresses his displeasure when Phoebe tastes Carol's breast milk to check the temperature.

Monica and Rachel's grumpy downstairs neighbor (Larry Hankin) dies and leaves all his belongings to the girls.

The group is amazed when Phoebe marries a Canadian ice dancer (Steve Zahn) to help him get his green card.

While the gang waits for the reopening of Stuart's comic book store Wolowitz gets some shocking news; Penny has trouble taking her own advice; Leonard and Raj think they spot Nathan Fillion at a restaurant.

Penny and Sheldon design an experiment - as a joke - to make participants fall in love; Howard and Bernadette get into trouble at the airport.

A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard; a blackout at Mrs. Wolowitz's results in a final dinner in her honor.

When Sheldon and Leonard are asked to speak at UC Berkeley, they take a detour in hope of meeting an idol; Raj and Amy try to settle a dispute between Howard and Bernadette with a game of ping pong.

Amy finds out that Sheldon applied for a one-way mission to colonize Mars; a trip to the pet store leads to a fight; Leonard has a surprise for Penny; Raj is busted while snooping in Emily's apartment.

Darlene earns a promotion at Wellman Plastics; Ben decides on a new career path; Jackie tries a herbal tea, and it leads to an emotional revelation.

While the gang waits for the reopening of Stuart's comic book store Wolowitz gets some shocking news; Penny has trouble taking her own advice; Leonard and Raj think they spot Nathan Fillion at a restaurant.

Penny and Sheldon design an experiment - as a joke - to make participants fall in love; Howard and Bernadette get into trouble at the airport.

Amy finds out that Sheldon applied for a one-way mission to colonize Mars; a trip to the pet store leads to a fight; Leonard has a surprise for Penny; Raj is busted while snooping in Emily's apartment.

When Sheldon and Leonard are asked to speak at UC Berkeley, they take a detour in hope of meeting an idol; Raj and Amy try to settle a dispute between Howard and Bernadette with a game of ping pong.

Rachel decides to look up her former boyfriend (Cosimo Fusco) when she is distraught over Ross' new girlfriend (Lauren Tom).

While tending his son, Ross expresses his displeasure when Phoebe tastes Carol's breast milk to check the temperature.

Monica and Rachel's grumpy downstairs neighbor (Larry Hankin) dies and leaves all his belongings to the girls.

The group is amazed when Phoebe marries a Canadian ice dancer (Steve Zahn) to help him get his green card.

A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard; a blackout at Mrs. Wolowitz's results in a final dinner in her honor.

When Sheldon and Leonard are asked to speak at UC Berkeley, they take a detour in hope of meeting an idol; Raj and Amy try to settle a dispute between Howard and Bernadette with a game of ping pong.

Harris brings home her new friend, Josh, leaving the family questioning his intentions; Becky and Ben's attempt to build a closet stirs up family drama.

Darlene earns a promotion at Wellman Plastics; Ben decides on a new career path; Jackie tries a herbal tea, and it leads to an emotional revelation.

Brent talks Hank into starting a blog; Lacey's friend gets her own cooking show; Wanda helps Davis with his taxes.

Brent realizes that Corner Gas may not actually be within the town of Dog River.

The women can't get rid of Hank from a girls-only event; Brent stocks a new drink and Wanda is attracted to its cardboard promotion.

At the Summer Solstice Deck Party, the locals compete for a seat in the sun, Brent sells popsicles and Karen and Davis must share a gun.

Angela, Ashley and Brian are super surprised and excited to be in the Cash Cab; they're riding high until they get stumped.

As they enter the taxi, these contestants mutter "too bad this wasn't the Cash Cab," and are completely delighted to find out where they are.

Brent talks Hank into starting a blog; Lacey's friend gets her own cooking show; Wanda helps Davis with his taxes.

Brent realizes that Corner Gas may not actually be within the town of Dog River.

The women can't get rid of Hank from a girls-only event; Brent stocks a new drink and Wanda is attracted to its cardboard promotion.

At the Summer Solstice Deck Party, the locals compete for a seat in the sun, Brent sells popsicles and Karen and Davis must share a gun.

Angela, Ashley and Brian are super surprised and excited to be in the Cash Cab; they're riding high until they get stumped.

As they enter the taxi, these contestants mutter "too bad this wasn't the Cash Cab," and are completely delighted to find out where they are.

Brent talks Hank into starting a blog; Lacey's friend gets her own cooking show; Wanda helps Davis with his taxes.

Brent realizes that Corner Gas may not actually be within the town of Dog River.

The women can't get rid of Hank from a girls-only event; Brent stocks a new drink and Wanda is attracted to its cardboard promotion.

At the Summer Solstice Deck Party, the locals compete for a seat in the sun, Brent sells popsicles and Karen and Davis must share a gun.

Chuck's new purchase of a boat creates a rift; Darlene hires her first assistant at Wellman's Plastics but soon realizes she is anything but helpful; Jackie is laser-focused on her dream of being a contestant on "Jeopardy!".

Rachel decides to look up her former boyfriend (Cosimo Fusco) when she is distraught over Ross' new girlfriend (Lauren Tom).

While tending his son, Ross expresses his displeasure when Phoebe tastes Carol's breast milk to check the temperature.

Monica and Rachel's grumpy downstairs neighbor (Larry Hankin) dies and leaves all his belongings to the girls.

The group is amazed when Phoebe marries a Canadian ice dancer (Steve Zahn) to help him get his green card.

Sheldon and Amy build a blanket fort - and come to a crossroads in their relationship; Wolowitz meets a half-brother he didn't know he had; Leonard and Penny have an argument during an appearance on Wil Wheaton's podcast.

The guys fight over what message Raj should write for NASA in case of alien contact; Penny has to decide between auditioning for a movie or keeping her pharmaceutical sales job.

Wolowitz questions his engineering skills after he and Sheldon can't get a toy drone to fly; a canceled flight puts Leonard's plans in jeopardy; Raj sets his parents against one another after he's cut off financially.

Chuck's new purchase of a boat creates a rift; Darlene hires her first assistant at Wellman's Plastics but soon realizes she is anything but helpful; Jackie is laser-focused on her dream of being a contestant on "Jeopardy!".

Darlene starts to feel the pressures of her new job; Dan attempts to help Ben out at the hardware store, but the two don't always agree on how to run the business.

Inspired by his hero, Albert Einstein, Sheldon tries his hand at the violin; Mary and Meemaw secretly buy a pregnancy test when Mary thinks she's pregnant.

Sheldon moves in with Dr. Sturgis for the weekend to see what his life will be like in college; a lonely Mary tries to bond with the other Coopers during Sheldon's absence.