Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

When Sheldon bans Penny from the apartment for a series of petty infractions, Penny vows to get revenge.

Darlene gets one surprise after another when David introduces his girlfriend at a parent-teacher conference and mentions that Mark and Harris will be spending the weekend with them; Dan hires Becky to help out at work.

Leonard and his friends stage an intervention to force Sheldon to face his fear of driving.

Sheldon and the gang are confused when a young grad student is attracted to him.

When Sheldon bans Penny from the apartment for a series of petty infractions, Penny vows to get revenge.

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

Meemaw causes a feud when she refuses to give George Sr. her brisket recipe; the kids try to resolve the feud.

George Sr. takes the boys on a road trip to see a space shuttle launch; Mary, Missy, and Meemaw have a girls weekend at the salon.

Sheldon is forced to tutor Georgie when poor grades threaten his brother's future on the football team.

When Sheldon moves to Dallas to attend a school for gifted children, the family struggles to cope with his absence.

Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.

Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards.

A sudden turn of events forces the Conners to face the daily struggles of life in Lanford in a way they never have before.

Darlene gets one surprise after another when David introduces his girlfriend at a parent-teacher conference and mentions that Mark and Harris will be spending the weekend with them; Dan hires Becky to help out at work.

Oscar tries to catch a mouse; Brent and Hank invent a new game.

Lacey sets up an employee of the month program; Hank takes up a new hobby, and drives Emma crazy.

Hank believes he can run a gumball business, but Oscar lends his help and a hidden talent from Karen helps it succeed.

Brents finds a way to stop Oscar from saying the J-word, but discovers it might not have been so bad.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Blood is shed in the name of trivia when a contestant nearly breaks his nose in a moment of celebration; "Man vs. Food" host Casey Webb makes a special guest appearance; Ben makes dreams come true for two brothers who get their chance to play.

Oscar tries to catch a mouse; Brent and Hank invent a new game.

Lacey sets up an employee of the month program; Hank takes up a new hobby, and drives Emma crazy.

Hank believes he can run a gumball business, but Oscar lends his help and a hidden talent from Karen helps it succeed.

Brents finds a way to stop Oscar from saying the J-word, but discovers it might not have been so bad.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Blood is shed in the name of trivia when a contestant nearly breaks his nose in a moment of celebration; "Man vs. Food" host Casey Webb makes a special guest appearance; Ben makes dreams come true for two brothers who get their chance to play.

Oscar tries to catch a mouse; Brent and Hank invent a new game.

Lacey sets up an employee of the month program; Hank takes up a new hobby, and drives Emma crazy.

Hank believes he can run a gumball business, but Oscar lends his help and a hidden talent from Karen helps it succeed.

Brents finds a way to stop Oscar from saying the J-word, but discovers it might not have been so bad.

An email from the school banning certain Halloween costumes, including Mark's, sets off an argument between Dan and Darlene; Jackie introduces someone to the family at the Halloween party and insists that Dan vet him, but she immediately regrets it.

Meemaw causes a feud when she refuses to give George Sr. her brisket recipe; the kids try to resolve the feud.

George Sr. takes the boys on a road trip to see a space shuttle launch; Mary, Missy, and Meemaw have a girls weekend at the salon.

Sheldon is forced to tutor Georgie when poor grades threaten his brother's future on the football team.

When Sheldon moves to Dallas to attend a school for gifted children, the family struggles to cope with his absence.

Leonard asks Penny for advice when his new relationship starts moving too fast.

When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important teammate in an upcoming fighting-robot competition.

Sheldon develops a scientific procedure for making friends; Kripke controls a new supercomputer.

An email from the school banning certain Halloween costumes, including Mark's, sets off an argument between Dan and Darlene; Jackie introduces someone to the family at the Halloween party and insists that Dan vet him, but she immediately regrets it.

When Geena learns that D.J. hasn't been taking Mary to church, she insists they go as a family; Mark's attempt to conduct an unbiased survey on the upcoming election for his school project goes south when Jackie volunteers to help.

Sheldon is required to attend Sunday school, but when he returns he decides to learn all he can about a multitude of religions.

Sheldon asks for a computer and unknowingly sparks an argument between Mary and George Sr. over the family's finances; Mary and the twins move in with Meemaw.

For young Sheldon Cooper, it isn't easy growing up in East Texas. Being a once-in-a-generation mind capable of advanced mathematics and science isn't always helpful in a land where church and football are king. And while the vulnerable, gifted and somewhat naive Sheldon deals with the world, his very normal family must find a way to deal with him. His father, George, is struggling to find his way as a high school football coach and as father to a boy he doesn't understand. Sheldon's mother, Mary, fiercely protects and nurtures her son. For 12 years on "The Big Bang Theory," audiences came to know the iconic, eccentric and extraordinary Sheldon Cooper. In "Young Sheldon," audiences get a chance to meet him in childhood, as he embarks on his innocent, awkward and hopeful journey toward the man he will become. Jim Parsons, who plays the adult version of Sheldon on "The Big Bang Theory," narrates.

When Mary takes a job as church secretary, she finds herself becoming Pastor Jeff's marriage counselor; Sheldon and Missy spend their first afternoon home alone.

Leonard asks Penny for advice when his new relationship starts moving too fast.

When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important teammate in an upcoming fighting-robot competition.

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother (Christine Baranski).

The pizza sauce company Bubbles and Ricky started is doing well, but they get an idea for a new opportunity when they get a lead on where Julian has been living.

Ricky thinks Jacob is a "zombie," while Bubs thinks he's actually an alien; the guys make Cory and Jacob steal fertilizer from a farmer.

Leonard asks Penny for advice when his new relationship starts moving too fast.

When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important teammate in an upcoming fighting-robot competition.

Sheldon develops a scientific procedure for making friends; Kripke controls a new supercomputer.

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother (Christine Baranski).

The pizza sauce company Bubbles and Ricky started is doing well, but they get an idea for a new opportunity when they get a lead on where Julian has been living.

Ricky thinks Jacob is a "zombie," while Bubs thinks he's actually an alien; the guys make Cory and Jacob steal fertilizer from a farmer.

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother (Christine Baranski).

The pizza sauce company Bubbles and Ricky started is doing well, but they get an idea for a new opportunity when they get a lead on where Julian has been living.

Ricky thinks Jacob is a "zombie," while Bubs thinks he's actually an alien; the guys make Cory and Jacob steal fertilizer from a farmer.

Hank and Davis lead the fight against a call center that might come to Dog River.

Lacey is suspicious of the illegal duplication of Dog River money; Hank gets a case of pink eye, causing Brent and Wanda to panic in Corner Gas; Karen is frustrated with Davis.

Emma goes Christmas shopping early making everyone curious to find out what they are getting.

Karen and Davis figure out a way to get Emma to do free cleaning.

Oscar and Emma discover an easy way to make some fast money; Davis decides to take off with Brent's car.

Lacey gets invited to join the Dog River Women's Club, but soon realizes that it isn't right for her.

A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is aboard the train they are taking to San Francisco.

Penny's home business turns into a complete nightmare when Sheldon takes over.

Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.

Wolowitz and Leonard decide to check out a local bar on Ladies' Night.

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.

Penny makes a surprising revelation about Leonard while on her date with Stuart; Wolowitz finds a critical design flaw in his NASA project.

While Leonard prepares for a three-month science expedition, he and Penny re-evaluate their feelings for each other.

After tampering with Sheldon's Arctic-expedition data, the guys follow him back to Texas, which threatens Leonard's chances for romance with Penny.

Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.

Howard and Raj hit a Goth nightclub to meet women; Sheldon tries chocolate-based behavior modification on Penny.

Raj faces deportation if he does not find a job; Leonard and Penny deal with Howard as a third wheel.

Sheldon seeks revenge on his nemesis, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends.

Sheldon teaches Leonard how to understand football; a kite-fighting incident threatens Howard and Raj's friendship.

A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is aboard the train they are taking to San Francisco.

Penny's home business turns into a complete nightmare when Sheldon takes over.

Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.

Wolowitz and Leonard decide to check out a local bar on Ladies' Night.

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.

Penny makes a surprising revelation about Leonard while on her date with Stuart; Wolowitz finds a critical design flaw in his NASA project.

While Leonard prepares for a three-month science expedition, he and Penny re-evaluate their feelings for each other.

After tampering with Sheldon's Arctic-expedition data, the guys follow him back to Texas, which threatens Leonard's chances for romance with Penny.

Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.

Howard and Raj hit a Goth nightclub to meet women; Sheldon tries chocolate-based behavior modification on Penny.

Raj faces deportation if he does not find a job; Leonard and Penny deal with Howard as a third wheel.

Sheldon seeks revenge on his nemesis, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends.

Sheldon teaches Leonard how to understand football; a kite-fighting incident threatens Howard and Raj's friendship.

A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz.

Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is aboard the train they are taking to San Francisco.

Penny's home business turns into a complete nightmare when Sheldon takes over.

Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.

Wolowitz and Leonard decide to check out a local bar on Ladies' Night.

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.

Penny makes a surprising revelation about Leonard while on her date with Stuart; Wolowitz finds a critical design flaw in his NASA project.

While Leonard prepares for a three-month science expedition, he and Penny re-evaluate their feelings for each other.

After tampering with Sheldon's Arctic-expedition data, the guys follow him back to Texas, which threatens Leonard's chances for romance with Penny.

Penny and Leonard try to recover from an awkward hookup; Howard and Sheldon make a high-stakes bet.

Howard and Raj hit a Goth nightclub to meet women; Sheldon tries chocolate-based behavior modification on Penny.

Raj faces deportation if he does not find a job; Leonard and Penny deal with Howard as a third wheel.

Sheldon seeks revenge on his nemesis, Wil Wheaton; Wolowitz wants Penny to set him up with one of her friends.

Sheldon teaches Leonard how to understand football; a kite-fighting incident threatens Howard and Raj's friendship.

It's the eve of Brent's 40th birthday; to celebrate, the town has planned a midnight party complete with fireworks and a parade.

Karen and Davis figure out a way to get Emma to do free cleaning.

Oscar and Emma discover an easy way to make some fast money; Davis decides to take off with Brent's car.

Lacey gets invited to join the Dog River Women's Club, but soon realizes that it isn't right for her.

It's the eve of Brent's 40th birthday; to celebrate, the town has planned a midnight party complete with fireworks and a parade.

Lacey is the unlikely champion of an eating contest; Emma enjoys the pleasures of an MP3 player.

Ross' new girlfriend wants to put their photograph on Christmas cards; Rachel eyes Joey as a possible partner.

Rachel and Joey might become more than friends; Chandler sets a Ms. Pac-Man record; Ross breaks land-speed records.

Joey might declare his love for Rachel, or Phoebe; Rachel breaks a pact with Ross; Chandler becomes mister bubble bath.

Joey realizes his intense feelings for Rachel are excluding Ross from the joys of impending fatherhood.

Monica prepares a memorable St. Valentine's Day for Chandler with sexy lingerie and X-rated entertainment.

Joey confesses his true feelings for Rachel; Phoebe introduces Monica to her new boyfriend (Harry Van Gorkum).

Rachel devises a lie about her unborn child that she hopes will break the silence between her and Joey; Phoebe reads tea leaves and predicts she will soon encounter the man of her dreams.

Phoebe brings her annoyingly upbeat boyfriend to the 35th anniversary of Monica and Ross' parents, who urge Ross and pregnant Rachel to pretend to be married.

When Soap Opera Digest requests an interview, Joey enlists his friends to make sure he does not say anything that could cost him his role.

During her baby shower, Rachel realizes she is unprepared to be a mother and accepts her mother's (Marlo Thomas) offer to move in to help with the child.

A food critic blasts Monica's cooking in a newspaper review; a cute saleswoman riles Rachel when she flirts with Ross; Phoebe coaches Chandler for a job interview.

Monica and Phoebe make a bet after Rachel passes her delivery date; Chandler falls asleep at the premiere screening of Joey's new film.

Rachel goes into labor, enduring endless pain while anxious Ross hovers nearby and her waiting friends wreak havoc in the hospital.

After Rachel gives birth to her baby, she must confront relationship issues around her.

Ross' new girlfriend wants to put their photograph on Christmas cards; Rachel eyes Joey as a possible partner.

Rachel and Joey might become more than friends; Chandler sets a Ms. Pac-Man record; Ross breaks land-speed records.

Joey might declare his love for Rachel, or Phoebe; Rachel breaks a pact with Ross; Chandler becomes mister bubble bath.

Joey realizes his intense feelings for Rachel are excluding Ross from the joys of impending fatherhood.

Monica prepares a memorable St. Valentine's Day for Chandler with sexy lingerie and X-rated entertainment.

Joey confesses his true feelings for Rachel; Phoebe introduces Monica to her new boyfriend (Harry Van Gorkum).

Rachel devises a lie about her unborn child that she hopes will break the silence between her and Joey; Phoebe reads tea leaves and predicts she will soon encounter the man of her dreams.

Phoebe brings her annoyingly upbeat boyfriend to the 35th anniversary of Monica and Ross' parents, who urge Ross and pregnant Rachel to pretend to be married.

When Soap Opera Digest requests an interview, Joey enlists his friends to make sure he does not say anything that could cost him his role.

During her baby shower, Rachel realizes she is unprepared to be a mother and accepts her mother's (Marlo Thomas) offer to move in to help with the child.

A food critic blasts Monica's cooking in a newspaper review; a cute saleswoman riles Rachel when she flirts with Ross; Phoebe coaches Chandler for a job interview.

Monica and Phoebe make a bet after Rachel passes her delivery date; Chandler falls asleep at the premiere screening of Joey's new film.

Rachel goes into labor, enduring endless pain while anxious Ross hovers nearby and her waiting friends wreak havoc in the hospital.

After Rachel gives birth to her baby, she must confront relationship issues around her.

Ross' new girlfriend wants to put their photograph on Christmas cards; Rachel eyes Joey as a possible partner.

Rachel and Joey might become more than friends; Chandler sets a Ms. Pac-Man record; Ross breaks land-speed records.

Joey might declare his love for Rachel, or Phoebe; Rachel breaks a pact with Ross; Chandler becomes mister bubble bath.

Joey realizes his intense feelings for Rachel are excluding Ross from the joys of impending fatherhood.

Monica prepares a memorable St. Valentine's Day for Chandler with sexy lingerie and X-rated entertainment.

Joey confesses his true feelings for Rachel; Phoebe introduces Monica to her new boyfriend (Harry Van Gorkum).

Rachel devises a lie about her unborn child that she hopes will break the silence between her and Joey; Phoebe reads tea leaves and predicts she will soon encounter the man of her dreams.

Phoebe brings her annoyingly upbeat boyfriend to the 35th anniversary of Monica and Ross' parents, who urge Ross and pregnant Rachel to pretend to be married.

When Soap Opera Digest requests an interview, Joey enlists his friends to make sure he does not say anything that could cost him his role.

During her baby shower, Rachel realizes she is unprepared to be a mother and accepts her mother's (Marlo Thomas) offer to move in to help with the child.

A food critic blasts Monica's cooking in a newspaper review; a cute saleswoman riles Rachel when she flirts with Ross; Phoebe coaches Chandler for a job interview.

Monica and Phoebe make a bet after Rachel passes her delivery date; Chandler falls asleep at the premiere screening of Joey's new film.

Rachel goes into labor, enduring endless pain while anxious Ross hovers nearby and her waiting friends wreak havoc in the hospital.

After Rachel gives birth to her baby, she must confront relationship issues around her.

Brent and Lacey sponsor Davis' football team; Karen's reckless driving puts Hank in the driver's seat.

Brent offers self-serve; Lacey goes buffet style at the Ruby.

A greedy cross guard, a toy truck takeover and a woman dancing in water.

A convertible dog theft, a priest and a coffin and a rollerblade purse snatch.

Ben puts a father and son team to the test with the help of special guest star Andrew Zimmern (The Zimmern List); Ben experiences a CASH CAB first during a street shout-out; one rider receives the ultimate birthday present.

Ben Bailey questions two contestants with guest Richard Rawlings; the participants rely on intuition while attempting a return to the competition.

Brent and Lacey sponsor Davis' football team; Karen's reckless driving puts Hank in the driver's seat.

Brent offers self-serve; Lacey goes buffet style at the Ruby.

A greedy cross guard, a toy truck takeover and a woman dancing in water.

A convertible dog theft, a priest and a coffin and a rollerblade purse snatch.

Ben puts a father and son team to the test with the help of special guest star Andrew Zimmern (The Zimmern List); Ben experiences a CASH CAB first during a street shout-out; one rider receives the ultimate birthday present.

Ben Bailey questions two contestants with guest Richard Rawlings; the participants rely on intuition while attempting a return to the competition.

Brent and Lacey sponsor Davis' football team; Karen's reckless driving puts Hank in the driver's seat.

Brent offers self-serve; Lacey goes buffet style at the Ruby.

A greedy cross guard, a toy truck takeover and a woman dancing in water.

A convertible dog theft, a priest and a coffin and a rollerblade purse snatch.

A member of the family makes a life-changing announcement; Dan suspects Becky isn't holding up her end of the bargain with regard to her drinking; Darlene continues to look for a job; Jackie offers English lessons to a busboy.

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.

Sheldon tries to make peace when Leonard and Penny get into an argument.

Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.

After being humiliated on the radio, Sheldon vows to destroy Kripke; Wolowitz tries not to ruin his new relationship with Bernadette.

A member of the family makes a life-changing announcement; Dan suspects Becky isn't holding up her end of the bargain with regard to her drinking; Darlene continues to look for a job; Jackie offers English lessons to a busboy.

Jackie convinces Dan to build a chicken coop in the backyard, so the family can eat organic eggs; Becky meets with Andrea for the first time since the surrogacy mishap; Darlene deals with a sleazy customer at her casino job.

After Carrie tells Doug that it's okay for him to find other women attractive, he asks her to tell him which men she finds attractive. Unsurprisingly, this doesn't end well.

Carrie and Doug (Leah Remini, Kevin James) discuss the real definition of infidelity when Doug sees Deacon (Victor Williams) with another woman.

Deacon's recent separation forces Doug and Carrie to re-examine some things they may have taken for granted.

Doug dreams that he could solve all of his problems if he could assume the roles of vintage television characters.

Sheldon tries to make peace when Leonard and Penny get into an argument.

Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.

Sheldon tries to help Penny understand Leonard's work; Wolowitz gets jealous when Leonard starts hanging out with his new girlfriend.

Each at a crossroads, Jasmeet and his loved ones have to take a hard look at where they are and make some difficult decisions.

After being humiliated on the radio, Sheldon vows to destroy Kripke; Wolowitz tries not to ruin his new relationship with Bernadette.

Jackie convinces Dan to build a chicken coop in the backyard, so the family can eat organic eggs; Becky meets with Andrea for the first time since the surrogacy mishap; Darlene deals with a sleazy customer at her casino job.

Sheldon tries to make peace when Leonard and Penny get into an argument.

Penny is forced to rely on Sheldon when she is injured while Howard, Leonard and Raj are away.

After being humiliated on the radio, Sheldon vows to destroy Kripke; Wolowitz tries not to ruin his new relationship with Bernadette.

Each at a crossroads, Jasmeet and his loved ones have to take a hard look at where they are and make some difficult decisions.

After Carrie tells Doug that it's okay for him to find other women attractive, he asks her to tell him which men she finds attractive. Unsurprisingly, this doesn't end well.

Carrie and Doug (Leah Remini, Kevin James) discuss the real definition of infidelity when Doug sees Deacon (Victor Williams) with another woman.

Deacon's recent separation forces Doug and Carrie to re-examine some things they may have taken for granted.

Doug dreams that he could solve all of his problems if he could assume the roles of vintage television characters.

Each at a crossroads, Jasmeet and his loved ones have to take a hard look at where they are and make some difficult decisions.

A member of the family makes a life-changing announcement; Dan suspects Becky isn't holding up her end of the bargain with regard to her drinking; Darlene continues to look for a job; Jackie offers English lessons to a busboy.

Jackie convinces Dan to build a chicken coop in the backyard, so the family can eat organic eggs; Becky meets with Andrea for the first time since the surrogacy mishap; Darlene deals with a sleazy customer at her casino job.

The air conditioner breaks at Corner Gas; Karen and Davis win the meat lottery.

Karen's reputation as a woman of the law is marred when an accidental muffin incident causes chaos for the team.

Wanda, Lacey, and Karen team up to fix The Ruby's broken toaster; Emma and Oscar have an impression-off; Davis is excited when he discovers Hank owns a valuable action figure.

Oscar's convinced there's a venomous cobra in his backyard; Hank discovers an intriguing bird's nest and sets up a livestream, so everyone in town can watch the eggs hatch.

Two longtime friends make the ultimate mistake; a group of bar buddies take their best shot in the cab.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

The air conditioner breaks at Corner Gas; Karen and Davis win the meat lottery.

Karen's reputation as a woman of the law is marred when an accidental muffin incident causes chaos for the team.

Wanda, Lacey, and Karen team up to fix The Ruby's broken toaster; Emma and Oscar have an impression-off; Davis is excited when he discovers Hank owns a valuable action figure.

Oscar's convinced there's a venomous cobra in his backyard; Hank discovers an intriguing bird's nest and sets up a livestream, so everyone in town can watch the eggs hatch.

Two longtime friends make the ultimate mistake; a group of bar buddies take their best shot in the cab.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

The air conditioner breaks at Corner Gas; Karen and Davis win the meat lottery.

Karen's reputation as a woman of the law is marred when an accidental muffin incident causes chaos for the team.

Wanda, Lacey, and Karen team up to fix The Ruby's broken toaster; Emma and Oscar have an impression-off; Davis is excited when he discovers Hank owns a valuable action figure.

Oscar's convinced there's a venomous cobra in his backyard; Hank discovers an intriguing bird's nest and sets up a livestream, so everyone in town can watch the eggs hatch.

Dan questions Peter's motives when he learns about the pricey Christmas gift Jackie purchased for her new, unemployed beau; Mark and Mary write up their Christmas wish lists; Darlene receives advice from an unlikely source.

After Carrie tells Doug that it's okay for him to find other women attractive, he asks her to tell him which men she finds attractive. Unsurprisingly, this doesn't end well.

Carrie and Doug (Leah Remini, Kevin James) discuss the real definition of infidelity when Doug sees Deacon (Victor Williams) with another woman.

Deacon's recent separation forces Doug and Carrie to re-examine some things they may have taken for granted.

Doug dreams that he could solve all of his problems if he could assume the roles of vintage television characters.

Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.

After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Dan questions Peter's motives when he learns about the pricey Christmas gift Jackie purchased for her new, unemployed beau; Mark and Mary write up their Christmas wish lists; Darlene receives advice from an unlikely source.

Becky helps Harris keep a secret from Darlene, which causes a rift between the sisters; Jackie supports Peter with his project; Dan and an old friend reunite.

Joey finds himself engaged to Rachel soon after she delivers her baby girl, while Phoebe assumes Ross is the one who proposed; Joey sneaks a peek as Rachel tries unsuccessfully to nurse; Monica and Chandler retire to a supply closet for privacy.

Joey seeks forgiveness from Ross, while Rachel tries to quell Emma's incessant crying.

Emma's pediatrician drops her as a patient because of Rachel's constant calls.

Monica fears Chandler has a sexual fetish involving sharks; Phoebe fears losing her boyfriend.

Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.

After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

Sheldon ends up in traffic court after getting a ticket because of Penny.

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Becky helps Harris keep a secret from Darlene, which causes a rift between the sisters; Jackie supports Peter with his project; Dan and an old friend reunite.

Sheldon and Koothrappali attend a university mixer; Leonard discovers that Penny believes in psychics.

After their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.

Sheldon tries to figure out the answer to a physics problem by working with Penny.

Sheldon ends up in traffic court after getting a ticket because of Penny.

Joey finds himself engaged to Rachel soon after she delivers her baby girl, while Phoebe assumes Ross is the one who proposed; Joey sneaks a peek as Rachel tries unsuccessfully to nurse; Monica and Chandler retire to a supply closet for privacy.

Joey seeks forgiveness from Ross, while Rachel tries to quell Emma's incessant crying.

Emma's pediatrician drops her as a patient because of Rachel's constant calls.

Monica fears Chandler has a sexual fetish involving sharks; Phoebe fears losing her boyfriend.

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

Sheldon ends up in traffic court after getting a ticket because of Penny.

Dan questions Peter's motives when he learns about the pricey Christmas gift Jackie purchased for her new, unemployed beau; Mark and Mary write up their Christmas wish lists; Darlene receives advice from an unlikely source.

Becky helps Harris keep a secret from Darlene, which causes a rift between the sisters; Jackie supports Peter with his project; Dan and an old friend reunite.

Oscar and Emma enjoy Lacey's company in their new hot tub a lot more than Lacey enjoys theirs; the police department introduces Safety Pete.

Wanda becomes a reporter for the Howler; Brent takes guitar lessons.

Brent discovers his parents put money aside for him, but Oscar's forgotten where it is; Karen and Davis are hurt to learn how often people lie to the police and enlist Wanda as their lie detector.

Karen, Wanda, and Lacey struggle to get noticed on a dating app; Oscar, Emma, and Hank try to figure out who purchased the abandoned lot in town.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

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

Oscar and Emma enjoy Lacey's company in their new hot tub a lot more than Lacey enjoys theirs; the police department introduces Safety Pete.

Wanda becomes a reporter for the Howler; Brent takes guitar lessons.

Brent discovers his parents put money aside for him, but Oscar's forgotten where it is; Karen and Davis are hurt to learn how often people lie to the police and enlist Wanda as their lie detector.

Karen, Wanda, and Lacey struggle to get noticed on a dating app; Oscar, Emma, and Hank try to figure out who purchased the abandoned lot in town.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

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

Oscar and Emma enjoy Lacey's company in their new hot tub a lot more than Lacey enjoys theirs; the police department introduces Safety Pete.

Wanda becomes a reporter for the Howler; Brent takes guitar lessons.

Brent discovers his parents put money aside for him, but Oscar's forgotten where it is; Karen and Davis are hurt to learn how often people lie to the police and enlist Wanda as their lie detector.

Karen, Wanda, and Lacey struggle to get noticed on a dating app; Oscar, Emma, and Hank try to figure out who purchased the abandoned lot in town.

When Dan gets injured while covering D.J.'s vending machine route, the decision to sue the company could cost D.J. his job; Jackie is appalled when Becky seeks life coaching from her nemesis.

Joey finds himself engaged to Rachel soon after she delivers her baby girl, while Phoebe assumes Ross is the one who proposed; Joey sneaks a peek as Rachel tries unsuccessfully to nurse; Monica and Chandler retire to a supply closet for privacy.

Joey seeks forgiveness from Ross, while Rachel tries to quell Emma's incessant crying.

Emma's pediatrician drops her as a patient because of Rachel's constant calls.

Monica fears Chandler has a sexual fetish involving sharks; Phoebe fears losing her boyfriend.

When the guys buy a ring from "The Lord of the Rings" at a garage sale, the item threatens to tear them apart.

Sheldon's stage fright stands between him and a coveted award.

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off once again.

When Dan gets injured while covering D.J.'s vending machine route, the decision to sue the company could cost D.J. his job; Jackie is appalled when Becky seeks life coaching from her nemesis.

When Ben offers Mark free piano lessons, Darlene uses it as an opportunity to test his parenting skills; Jackie throws Becky a baby shower; Emilio continues his efforts to be part of the baby's life.

While Phoebe and Joey wait at a fancy restaurant to celebrate Phoebe's birthday, Rachel is afraid to leave her infant with a babysitter; Monica and Chandler also fail to arrive on time after they fight over Chandler's urge to resume smoking.

Ross mocks Rachel's new male nanny (Freddie Prinze Jr.); Chandler becomes upset when Monica says that somebody from her job is the funniest guy she's ever met.

Chandler and Joey find a videotape while checking out Richard's apartment; Ross sings Emma an off-color lullaby.

Rachel has a bone to pick with her self-centered sister (Christina Applegate) on Thanksgiving; Monica protects her good wedding china; Joey forgets to join his TV cast mates for the Thanksgiving parade.

When the guys buy a ring from "The Lord of the Rings" at a garage sale, the item threatens to tear them apart.

Sheldon's stage fright stands between him and a coveted award.

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off once again.

When Ben offers Mark free piano lessons, Darlene uses it as an opportunity to test his parenting skills; Jackie throws Becky a baby shower; Emilio continues his efforts to be part of the baby's life.

When the guys buy a ring from "The Lord of the Rings" at a garage sale, the item threatens to tear them apart.

Sheldon's stage fright stands between him and a coveted award.

Penny and Leonard have a fight that threatens their relationship; Sheldon and Wil Wheaton face off once again.

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

While Phoebe and Joey wait at a fancy restaurant to celebrate Phoebe's birthday, Rachel is afraid to leave her infant with a babysitter; Monica and Chandler also fail to arrive on time after they fight over Chandler's urge to resume smoking.

Ross mocks Rachel's new male nanny (Freddie Prinze Jr.); Chandler becomes upset when Monica says that somebody from her job is the funniest guy she's ever met.

Chandler and Joey find a videotape while checking out Richard's apartment; Ross sings Emma an off-color lullaby.

Rachel has a bone to pick with her self-centered sister (Christina Applegate) on Thanksgiving; Monica protects her good wedding china; Joey forgets to join his TV cast mates for the Thanksgiving parade.

Sheldon goes to extremes to keep Leonard and Penny happy when they stop speaking to each other.

Sheldon invites a famous physicist to the apartment, and competes with Leonard for her attention.

When Dan gets injured while covering D.J.'s vending machine route, the decision to sue the company could cost D.J. his job; Jackie is appalled when Becky seeks life coaching from her nemesis.

When Ben offers Mark free piano lessons, Darlene uses it as an opportunity to test his parenting skills; Jackie throws Becky a baby shower; Emilio continues his efforts to be part of the baby's life.

Brent tries to prove he is the biggest Saskatchewan Roughriders fan.

Oscar kicks off the New Year with startling news about his national identity; the gang gets involved in a resolution contest.

Brent and Karen go to war over the antiquated laws in Dog River; Hank and Emma track down Oscar's prize quarter.

When Dog River is given a town bell, the citizens can't agree how it should be used; Oscar and Emma become coffee snobs and Brent investigates Wanda's strange spy-like behavior.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Brent tries to prove he is the biggest Saskatchewan Roughriders fan.

Oscar kicks off the New Year with startling news about his national identity; the gang gets involved in a resolution contest.

Brent and Karen go to war over the antiquated laws in Dog River; Hank and Emma track down Oscar's prize quarter.

When Dog River is given a town bell, the citizens can't agree how it should be used; Oscar and Emma become coffee snobs and Brent investigates Wanda's strange spy-like behavior.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Brent tries to prove he is the biggest Saskatchewan Roughriders fan.

Oscar kicks off the New Year with startling news about his national identity; the gang gets involved in a resolution contest.

Brent and Karen go to war over the antiquated laws in Dog River; Hank and Emma track down Oscar's prize quarter.

When Dog River is given a town bell, the citizens can't agree how it should be used; Oscar and Emma become coffee snobs and Brent investigates Wanda's strange spy-like behavior.

As Darlene grapples with a life-changing offer from Ben, an unexpected conversation with David turns her world even more upside down; relationship problems lead Jackie to the bottom of the bottle; Dan delivers alarming news.

While Phoebe and Joey wait at a fancy restaurant to celebrate Phoebe's birthday, Rachel is afraid to leave her infant with a babysitter; Monica and Chandler also fail to arrive on time after they fight over Chandler's urge to resume smoking.

Ross mocks Rachel's new male nanny (Freddie Prinze Jr.); Chandler becomes upset when Monica says that somebody from her job is the funniest guy she's ever met.

Chandler and Joey find a videotape while checking out Richard's apartment; Ross sings Emma an off-color lullaby.

Rachel has a bone to pick with her self-centered sister (Christina Applegate) on Thanksgiving; Monica protects her good wedding china; Joey forgets to join his TV cast mates for the Thanksgiving parade.

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.

As Darlene grapples with a life-changing offer from Ben, an unexpected conversation with David turns her world even more upside down; relationship problems lead Jackie to the bottom of the bottle; Dan delivers alarming news.

In the wake of Emilio's deportation, Jackie steps into the role of a paternal figure and creates a meticulous birth plan for Becky; Darlene is tangled in a complex love triangle with David and Ben; Harris is caught up in a problem of her own.

Sheldon makes friends with an upperclassman who introduces him to a new field of science; Mary and George disagree on how to handle Sheldon's blossoming social life.

A disappointing loss at the science fair sends Sheldon's life in a new direction.

Sheldon is bullied by an unlikely character; Mary and George disagree on how to handle the situation.

Mary bans Sheldon from reading a mature comic book; Sheldon decides it's time to stop living under Mary's thumb.

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

When Sheldon searches for an alternative to human companionship, the guys become concerned.

Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.

In the wake of Emilio's deportation, Jackie steps into the role of a paternal figure and creates a meticulous birth plan for Becky; Darlene is tangled in a complex love triangle with David and Ben; Harris is caught up in a problem of her own.

Leonard tells Penny about how he met Sheldon and what happened to the elevator.

Raj and Howard set up an online dating profile for Sheldon and find the perfect woman.

Penny tags along on Sheldon's first date; Wolowitz finds a new use for a robotic arm.

When Sheldon searches for an alternative to human companionship, the guys become concerned.

Sheldon makes friends with an upperclassman who introduces him to a new field of science; Mary and George disagree on how to handle Sheldon's blossoming social life.

A disappointing loss at the science fair sends Sheldon's life in a new direction.

Sheldon is bullied by an unlikely character; Mary and George disagree on how to handle the situation.

Mary bans Sheldon from reading a mature comic book; Sheldon decides it's time to stop living under Mary's thumb.

Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

When Sheldon searches for an alternative to human companionship, the guys become concerned.

As Darlene grapples with a life-changing offer from Ben, an unexpected conversation with David turns her world even more upside down; relationship problems lead Jackie to the bottom of the bottle; Dan delivers alarming news.

In the wake of Emilio's deportation, Jackie steps into the role of a paternal figure and creates a meticulous birth plan for Becky; Darlene is tangled in a complex love triangle with David and Ben; Harris is caught up in a problem of her own.

Brent pleads with Hank not to embarrass him when they go to see Brent's favorite comic book writer.

After an incident leaves the townsfolk puzzled, Karen tries to convince the entire town that she is not actually a crazy cat lady.

Davis is sent to a sensitivity course after making too many blonde jokes.

Brent finds a creative way to get through a week of no TV with the help of Hank and Wanda.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Brent pleads with Hank not to embarrass him when they go to see Brent's favorite comic book writer.

After an incident leaves the townsfolk puzzled, Karen tries to convince the entire town that she is not actually a crazy cat lady.

Davis is sent to a sensitivity course after making too many blonde jokes.

Brent finds a creative way to get through a week of no TV with the help of Hank and Wanda.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Unsuspecting members of the public climbing into an apparently normal taxicab, only to find themselves on national television, with a chance to win a small fortune; hosted by Adam Growe.

Brent pleads with Hank not to embarrass him when they go to see Brent's favorite comic book writer.

After an incident leaves the townsfolk puzzled, Karen tries to convince the entire town that she is not actually a crazy cat lady.

Davis is sent to a sensitivity course after making too many blonde jokes.

Brent finds a creative way to get through a week of no TV with the help of Hank and Wanda.

Darlene struggles to decide between David and Ben; Becky begins to doubt herself as a mom; Mark gets in trouble at school when a picture of him and his boyfriend kissing goes viral; Jackie avoids her problems by keeping busy with everyone else's.

Sheldon makes friends with an upperclassman who introduces him to a new field of science; Mary and George disagree on how to handle Sheldon's blossoming social life.

A disappointing loss at the science fair sends Sheldon's life in a new direction.

Sheldon is bullied by an unlikely character; Mary and George disagree on how to handle the situation.

Mary bans Sheldon from reading a mature comic book; Sheldon decides it's time to stop living under Mary's thumb.

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Leonard realizes he is the only one in his group without a girlfriend; Sheldon wants to get rid of his girlfriend.

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

Darlene struggles to decide between David and Ben; Becky begins to doubt herself as a mom; Mark gets in trouble at school when a picture of him and his boyfriend kissing goes viral; Jackie avoids her problems by keeping busy with everyone else's.

Harris is forced to confront Darlene about her lifestyle; Jackie involves herself in other people's problems to avoid confronting her own; Becky is overwhelmed by the costs of raising a baby, so her family steps in to help.

When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by Dr. John Sturgis.

A battle erupts in the neighborhood between the Coopers and the Sparks when Sheldon is terrorized by the Sparks' new dog.

Sheldon keeps tabs on Meemaw's budding relationship with Dr. Sturgis; George Sr. and Mary attempt to bond with their other children.

Meemaw is pursued by gentlemen callers; she is forced to set ground rules when Sheldon interferes.

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Leonard realizes he is the only one in his group without a girlfriend; Sheldon wants to get rid of his girlfriend.

Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.

While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

When Mo shoots Ricky in the groin, the boys can't agree on what kind of medical attention - if any - is called for.

Julian and Bubbles go lobster fishing, but Ricky is forced to stay behind and take care of Mo; Lahey tells Ricky that the police are out to get them.

An embarrassing secret of Wolowitz's is revealed; Raj and Sheldon get into a war at work.

Leonard realizes he is the only one in his group without a girlfriend; Sheldon wants to get rid of his girlfriend.

Leonard keeps an affair a secret from Sheldon, Howard and Raj.

While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

When Mo shoots Ricky in the groin, the boys can't agree on what kind of medical attention - if any - is called for.

Julian and Bubbles go lobster fishing, but Ricky is forced to stay behind and take care of Mo; Lahey tells Ricky that the police are out to get them.

Sheldon keeps tabs on Meemaw's budding relationship with Dr. Sturgis; George Sr. and Mary attempt to bond with their other children.

Meemaw is pursued by gentlemen callers; she is forced to set ground rules when Sheldon interferes.

Sheldon's interview with the FBI jeopardizes Wolowitz's security clearance.

While the guys camp out for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

Darlene struggles to decide between David and Ben; Becky begins to doubt herself as a mom; Mark gets in trouble at school when a picture of him and his boyfriend kissing goes viral; Jackie avoids her problems by keeping busy with everyone else's.

Harris is forced to confront Darlene about her lifestyle; Jackie involves herself in other people's problems to avoid confronting her own; Becky is overwhelmed by the costs of raising a baby, so her family steps in to help.

Wanda's new way of getting around town brings a European flair to Dog River; Hank's new greeting puts him in an awkward situation with Emma.

Brent and Hank take a trip down memory lane by stealing crab apples from a neighbor's yard; no one wants Oscar on their charades team; Davis and Wanda discover he benefits of complaining.

David tries to buy the original R2-D2 after Hank buys a robot online.

Emma causes tension at the elementary school after a teacher leaves her in charge.

As a windstorm creates havoc, Lacey's sign on her rooftop begins to lose all the letters one by one.

Brent has an opportunity to pursue his dream, but his weekly disappearances cause rumors to circulate.

Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope.

Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero.

The guys try to bond with Penny's new boyfriend through a costume contest.

Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.

A wealthy donor makes Leonard question what he is willing to do for science.

Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.

Sheldon is upset when he realizes Leonard is the center of their group of friends.

Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.

The guys try to figure out who hacked Sheldon's online-game account.

Amy and Sheldon spread gossip as part of an experiment; Howard decides to take a big step in his relationship with Bernadette.

Priya dissects the roommate agreement; the ladies take Sheldon dancing.

Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.

Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope.

Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero.

The guys try to bond with Penny's new boyfriend through a costume contest.

Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.

A wealthy donor makes Leonard question what he is willing to do for science.

Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.

Sheldon is upset when he realizes Leonard is the center of their group of friends.

Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.

The guys try to figure out who hacked Sheldon's online-game account.

Amy and Sheldon spread gossip as part of an experiment; Howard decides to take a big step in his relationship with Bernadette.

Priya dissects the roommate agreement; the ladies take Sheldon dancing.

Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.

Penny asks Leonard to lie to her father (Keith Carradine); Howard, Raj and Bernadette pull an all-nighter at a telescope.

Amy realizes she has feelings for Penny's ex; Koothrappali and Wolowitz try to prove who would be a better superhero.

The guys try to bond with Penny's new boyfriend through a costume contest.

Leonard's idea for a smartphone application causes friction in his friendship with Sheldon.

Bernadette runs into her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.

Sheldon takes acting lessons from Penny in hope of becoming a better teacher; Koothrappali fantasizes about his friend's girlfriend.

A wealthy donor makes Leonard question what he is willing to do for science.

Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.

Sheldon is upset when he realizes Leonard is the center of their group of friends.

Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.

The guys try to figure out who hacked Sheldon's online-game account.

Amy and Sheldon spread gossip as part of an experiment; Howard decides to take a big step in his relationship with Bernadette.

Priya dissects the roommate agreement; the ladies take Sheldon dancing.

Raj tries to cure his social anxiety; Penny spies on Leonard and his girlfriend through Bernadette.

As a windstorm creates havoc, Lacey's sign on her rooftop begins to lose all the letters one by one.

Brent has an opportunity to pursue his dream, but his weekly disappearances cause rumors to circulate.

A big city girl from Toronto moves in to run the coffee shop next door to the Corner Gas station.

A tax man comes to audit the Corner Gas business records; Lacey's approach to selling coffee doesn't fly with the locals.

Lacey offers free Pilates classes; Oscar takes steps to avoid being buried in a cheap looking coffin.

Brent agrees to baby-sit Wanda's troubled 6-year-old son, Tanner, to impress Lacey.

Rachel impulsively gives her telephone number to a handsome guy but worries he will call when Ross is there.

Monica fears the worst when she learns Chandler will be spending Christmas in Tulsa working on a deadline with a beautiful co-worker (Selma Blair).

When Rachel visits her workplace to show off baby Emma, she is surprised to find a handsome temporary worker, Gavin, who has been doing her job while she was on maternity leave; their immediate war of wills prompts Rachel to make a rash decision that she could regret; Joey arranges for Phoebe to get a job as an extra on his daytime drama series, but she wreaks havoc on the set. And, having quit his job, Chandler must get another, fast, because Monica desperately wants a family.

Monica invites Rachel's workplace rival (Dermot Mulroney) to her birthday party; Joey flirts with Emma's new nanny (Melissa George); Phoebe and Mike (Paul Rudd) take care of a litter of rats.

Monica exults in the applause she receives on karaoke night, unaware that the cheering audience can see through her blouse.

Joey and Phoebe conspire to send Rachel and Ross on disastrous blind dates; the ovulating Monica wants to get intimate with Chandler.

Joey stumbles upon a way to impress a famous actor (Jeff Goldblum) during an audition; Ross learns the identity of a long-ago mugger; Chandler accepts an internship at a shoe company.

Both Monica and Chandler secretly approach Joey for a loan; Phoebe invites Mike (Paul Rudd) to move in with her; Rachel baby-proofs the apartment.

Ross and Chandler trade barbed insults on their alma mater's Website; Phoebe's resolve not to call ex-boyfriend Mike (Paul Rudd) weakens.

The gang buys scads of lottery tickets for the multimillion-dollar jackpot; Rachel suspects baby Emma is on the verge of saying her first word.

Rachel's visit to a soap opera set inspires her to dream about Joey; Chandler takes Ross on a weekend getaway after Monica cannot take time off from work.

Ross invites an attractive paleontologist (Aisha Tyler) to a rooftop "Days of Our Lives" party being thrown by Joey.

Monica and Chandler run into an old acquaintance when they secretly go to a fertility clinic; Ross helps Joey woo the same professor (Aisha Tyler) he wants to date.

Monica and Chandler interview unsuspecting candidates, hoping to find the right man to father their baby.

Rachel impulsively gives her telephone number to a handsome guy but worries he will call when Ross is there.

Monica fears the worst when she learns Chandler will be spending Christmas in Tulsa working on a deadline with a beautiful co-worker (Selma Blair).

When Rachel visits her workplace to show off baby Emma, she is surprised to find a handsome temporary worker, Gavin, who has been doing her job while she was on maternity leave; their immediate war of wills prompts Rachel to make a rash decision that she could regret; Joey arranges for Phoebe to get a job as an extra on his daytime drama series, but she wreaks havoc on the set. And, having quit his job, Chandler must get another, fast, because Monica desperately wants a family.

Monica invites Rachel's workplace rival (Dermot Mulroney) to her birthday party; Joey flirts with Emma's new nanny (Melissa George); Phoebe and Mike (Paul Rudd) take care of a litter of rats.

Monica exults in the applause she receives on karaoke night, unaware that the cheering audience can see through her blouse.

Joey and Phoebe conspire to send Rachel and Ross on disastrous blind dates; the ovulating Monica wants to get intimate with Chandler.

Joey stumbles upon a way to impress a famous actor (Jeff Goldblum) during an audition; Ross learns the identity of a long-ago mugger; Chandler accepts an internship at a shoe company.

Both Monica and Chandler secretly approach Joey for a loan; Phoebe invites Mike (Paul Rudd) to move in with her; Rachel baby-proofs the apartment.