Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Sheldon and Missy both run away from home; Mary gets upsetting news about George Sr.

Sheldon encourages Missy to question the Bible; Meemaw is determined to catch George Sr. in a lie; Mary helps Pastor Jeff search for a youth pastor.

Sheldon tries to convince Dr. Sturgis to return to the university; Georgie upsets the family when he makes a life-changing decision.

Sheldon, Missy and Georgie adapt to new living arrangements; Meemaw opens a gambling room.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Raging Jim accidentally backs into a police car while chasing a guy and chooses anger-management classes instead of paying the fine.

Jim takes over housekeeping duties to give Cheryl time to grieve when her favorite uncle dies, but begins to suspect Cheryl is faking her grief to get him to do more housework.

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.

Davis tries to get Brent to join his rugby team; Brent's more focused on inventing a new rugby chant; Hank and Karen convince Lacey to start selling pizza in the Ruby.

The band Thunderface reunites; a song Brent wrote back in high school has Lacey investigating his mystery crush; Oscar shoots a fundraising video for the Seniors' Center.

A guest is annoyed by the lights on the ceiling, asking Adam to turn them off; she realizes this is a game in which she and her friends can make money, then it's game on.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

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.

Davis tries to get Brent to join his rugby team; Brent's more focused on inventing a new rugby chant; Hank and Karen convince Lacey to start selling pizza in the Ruby.

The band Thunderface reunites; a song Brent wrote back in high school has Lacey investigating his mystery crush; Oscar shoots a fundraising video for the Seniors' Center.

A guest is annoyed by the lights on the ceiling, asking Adam to turn them off; she realizes this is a game in which she and her friends can make money, then it's game on.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

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.

Davis tries to get Brent to join his rugby team; Brent's more focused on inventing a new rugby chant; Hank and Karen convince Lacey to start selling pizza in the Ruby.

The band Thunderface reunites; a song Brent wrote back in high school has Lacey investigating his mystery crush; Oscar shoots a fundraising video for the Seniors' Center.

Jim, Ryan and Andy learn that Cheryl and Dana have appeared in a "Chicks Gone Wild" video.

Sheldon and Missy both run away from home; Mary gets upsetting news about George Sr.

Sheldon encourages Missy to question the Bible; Meemaw is determined to catch George Sr. in a lie; Mary helps Pastor Jeff search for a youth pastor.

Sheldon tries to convince Dr. Sturgis to return to the university; Georgie upsets the family when he makes a life-changing decision.

Sheldon, Missy and Georgie adapt to new living arrangements; Meemaw opens a gambling room.

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.

Jim, Ryan and Andy learn that Cheryl and Dana have appeared in a "Chicks Gone Wild" video.

While Dana is in premature labor, Ryan is in a war-torn country, delivering a celebrity's baby.

Ross panics when he sees his son with a Barbie doll; Chandler's fear of commitment surfaces in his relationship with Janice.

Phoebe offers to buy Frank Jr. (Giovanni Ribisi) a massage; Joey tries to build an entertainment center.

When Janice asks the gang if any of them have ever slept together, the friends flash back to three years earlier.

When Monica buys a new bed from the "Mattress King" (Mark Cohen), the wrong one is delivered; Joey sees Janice kissing her husband; Rachel's father clashes with Ross.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

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

While Dana is in premature labor, Ryan is in a war-torn country, delivering a celebrity's baby.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Ross panics when he sees his son with a Barbie doll; Chandler's fear of commitment surfaces in his relationship with Janice.

Phoebe offers to buy Frank Jr. (Giovanni Ribisi) a massage; Joey tries to build an entertainment center.

When Janice asks the gang if any of them have ever slept together, the friends flash back to three years earlier.

When Monica buys a new bed from the "Mattress King" (Mark Cohen), the wrong one is delivered; Joey sees Janice kissing her husband; Rachel's father clashes with Ross.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Jim, Ryan and Andy learn that Cheryl and Dana have appeared in a "Chicks Gone Wild" video.

While Dana is in premature labor, Ryan is in a war-torn country, delivering a celebrity's baby.

Rookie cop Karen makes it her mission to find out who spray-painted "Grad 68" on the water tower.

Dog River decides to put up a giant landmark; Oscar struggles to stop a love-struck admirer from ruining his marriage.

Wanda repairs junk to re-sell at the community yard sale; Oscar, Emma, and Davis become obsessed with Karen's high-end beauty serums.

The Corner Gas parking lot becomes a drive-in; Hank puts Davis and Karen on high alert for potential criminal behavior; Oscar and Emma take advantage, reliving their youthful friskiness; Lacey touches a nerve of Brent's.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Rookie cop Karen makes it her mission to find out who spray-painted "Grad 68" on the water tower.

Dog River decides to put up a giant landmark; Oscar struggles to stop a love-struck admirer from ruining his marriage.

Wanda repairs junk to re-sell at the community yard sale; Oscar, Emma, and Davis become obsessed with Karen's high-end beauty serums.

The Corner Gas parking lot becomes a drive-in; Hank puts Davis and Karen on high alert for potential criminal behavior; Oscar and Emma take advantage, reliving their youthful friskiness; Lacey touches a nerve of Brent's.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Rookie cop Karen makes it her mission to find out who spray-painted "Grad 68" on the water tower.

Dog River decides to put up a giant landmark; Oscar struggles to stop a love-struck admirer from ruining his marriage.

Wanda repairs junk to re-sell at the community yard sale; Oscar, Emma, and Davis become obsessed with Karen's high-end beauty serums.

The Corner Gas parking lot becomes a drive-in; Hank puts Davis and Karen on high alert for potential criminal behavior; Oscar and Emma take advantage, reliving their youthful friskiness; Lacey touches a nerve of Brent's.

Dana and Cheryl hesitantly entrust Ryan and Jim to watch the kids and baby Tanner while they have a girls night out.

Ross panics when he sees his son with a Barbie doll; Chandler's fear of commitment surfaces in his relationship with Janice.

Phoebe offers to buy Frank Jr. (Giovanni Ribisi) a massage; Joey tries to build an entertainment center.

When Janice asks the gang if any of them have ever slept together, the friends flash back to three years earlier.

When Monica buys a new bed from the "Mattress King" (Mark Cohen), the wrong one is delivered; Joey sees Janice kissing her husband; Rachel's father clashes with Ross.

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.

Dana and Cheryl hesitantly entrust Ryan and Jim to watch the kids and baby Tanner while they have a girls night out.

Dana and baby Tanner stay with Jim and Cheryl for a night, but the baby's crying makes it impossible for Jim to sleep.

Chandler and Janice (Maggie Wheeler) reach a turning point in their relationship; the Ugly Naked Guy may be dead.

Emotions become the feast of the day when the gang plays a game of touch football on Thanksgiving; the turkey is left stewing when the losing team calls for a rematch.

Rachel wonders if she'll ever get another job after she quits Central Perk; Joey's new job selling Christmas trees upsets Phoebe; Ross accidentally breaks a little girl's leg.

Ross is suspicious about Rachel's possible job offer from a good-looking stranger (Steven Eckholdt); Chandler can't remember which of Joey's many sisters he kissed at a party.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

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

Dana and baby Tanner stay with Jim and Cheryl for a night, but the baby's crying makes it impossible for Jim to sleep.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Chandler and Janice (Maggie Wheeler) reach a turning point in their relationship; the Ugly Naked Guy may be dead.

Emotions become the feast of the day when the gang plays a game of touch football on Thanksgiving; the turkey is left stewing when the losing team calls for a rematch.

Rachel wonders if she'll ever get another job after she quits Central Perk; Joey's new job selling Christmas trees upsets Phoebe; Ross accidentally breaks a little girl's leg.

Ross is suspicious about Rachel's possible job offer from a good-looking stranger (Steven Eckholdt); Chandler can't remember which of Joey's many sisters he kissed at a party.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Dana and Cheryl hesitantly entrust Ryan and Jim to watch the kids and baby Tanner while they have a girls night out.

Dana and baby Tanner stay with Jim and Cheryl for a night, but the baby's crying makes it impossible for Jim to sleep.

Lacey's ex-fiancé comes to visit; the Dog River police track down a fugitive.

Dog River prepares for its annual talent show; Brent's cousin Carl, whom everyone seems to love, except Brent, comes for a visit.

Brent and Lacey go to great lengths to find each other the perfect Christmas present; Hank gets conned into helping Oscar and Emma prep their annual Christmas party; Wanda goes to war with the cops over her extreme Christmas lights display.

Brent and Wanda help Lacey overcome her fears so she can go skydiving; Hank becomes the town messenger; Oscar and Emma go to war with Karen and Davis over a prime potato planting locale.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Lacey's ex-fiancé comes to visit; the Dog River police track down a fugitive.

Dog River prepares for its annual talent show; Brent's cousin Carl, whom everyone seems to love, except Brent, comes for a visit.

Brent and Lacey go to great lengths to find each other the perfect Christmas present; Hank gets conned into helping Oscar and Emma prep their annual Christmas party; Wanda goes to war with the cops over her extreme Christmas lights display.

Brent and Wanda help Lacey overcome her fears so she can go skydiving; Hank becomes the town messenger; Oscar and Emma go to war with Karen and Davis over a prime potato planting locale.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Lacey's ex-fiancé comes to visit; the Dog River police track down a fugitive.

Dog River prepares for its annual talent show; Brent's cousin Carl, whom everyone seems to love, except Brent, comes for a visit.

Brent and Lacey go to great lengths to find each other the perfect Christmas present; Hank gets conned into helping Oscar and Emma prep their annual Christmas party; Wanda goes to war with the cops over her extreme Christmas lights display.

Brent and Wanda help Lacey overcome her fears so she can go skydiving; Hank becomes the town messenger; Oscar and Emma go to war with Karen and Davis over a prime potato planting locale.

Jim does not tell Cheryl that their health insurance has been canceled after he has an argument with a claims representative.

Chandler and Janice (Maggie Wheeler) reach a turning point in their relationship; the Ugly Naked Guy may be dead.

Emotions become the feast of the day when the gang plays a game of touch football on Thanksgiving; the turkey is left stewing when the losing team calls for a rematch.

Rachel wonders if she'll ever get another job after she quits Central Perk; Joey's new job selling Christmas trees upsets Phoebe; Ross accidentally breaks a little girl's leg.

Ross is suspicious about Rachel's possible job offer from a good-looking stranger (Steven Eckholdt); Chandler can't remember which of Joey's many sisters he kissed at a party.

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.

Jim does not tell Cheryl that their health insurance has been canceled after he has an argument with a claims representative.

Coach Jim turns his daughters' noncompetitive basketball team into tough, aggressive winners.

Ted is stunned to learn that Stella expects him to move to New Jersey after they wed.

Ted discovers that his friends ditched their plans to stage an intervention for his engagement to Stella, but he is adamant that they go through with it anyway.

Stella (Sarah Chalke) and Ted's spontaneous wedding plans are jeopardized by the presence of their exes.

A serendipitous meeting with someone from his past has Ted thinking about how he would handle running into someone he would prefer to forget.

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

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

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

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

Coach Jim turns his daughters' noncompetitive basketball team into tough, aggressive winners.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Ted is stunned to learn that Stella expects him to move to New Jersey after they wed.

Ted discovers that his friends ditched their plans to stage an intervention for his engagement to Stella, but he is adamant that they go through with it anyway.

Stella (Sarah Chalke) and Ted's spontaneous wedding plans are jeopardized by the presence of their exes.

A serendipitous meeting with someone from his past has Ted thinking about how he would handle running into someone he would prefer to forget.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Jim does not tell Cheryl that their health insurance has been canceled after he has an argument with a claims representative.

Coach Jim turns his daughters' noncompetitive basketball team into tough, aggressive winners.

Davis tries to keep up with Brent, technologically; Lacey tries to prove she has community spirit by trying to save one of the town's historic landmarks.

Lacey asks Brent to join her book club and helps him humiliate a comedian from out of town.

Brent puts a sign with slogans in front of the gas station and coffee shop; Brent and Emma worry about Oscar's memory.

Brent considers an offer from a rival hockey team when he feels he is being taken for granted.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Davis tries to keep up with Brent, technologically; Lacey tries to prove she has community spirit by trying to save one of the town's historic landmarks.

Lacey asks Brent to join her book club and helps him humiliate a comedian from out of town.

Brent puts a sign with slogans in front of the gas station and coffee shop; Brent and Emma worry about Oscar's memory.

Brent considers an offer from a rival hockey team when he feels he is being taken for granted.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Unassuming people enter a taxi cab as simple passengers taking a normal ride, only to be shocked when they discover that they're instant contestants. The host, Adam Grove, asks the passengers trivia questions as he escorts them to their destination.

Davis tries to keep up with Brent, technologically; Lacey tries to prove she has community spirit by trying to save one of the town's historic landmarks.

Lacey asks Brent to join her book club and helps him humiliate a comedian from out of town.

Brent puts a sign with slogans in front of the gas station and coffee shop; Brent and Emma worry about Oscar's memory.

Brent considers an offer from a rival hockey team when he feels he is being taken for granted.

The Ghost of Andy gives Jim a glimpse of Kyle's future as a loser because of Jim's failed attempts to help his son during a softball game.

Ted is stunned to learn that Stella expects him to move to New Jersey after they wed.

Ted discovers that his friends ditched their plans to stage an intervention for his engagement to Stella, but he is adamant that they go through with it anyway.

Stella (Sarah Chalke) and Ted's spontaneous wedding plans are jeopardized by the presence of their exes.

A serendipitous meeting with someone from his past has Ted thinking about how he would handle running into someone he would prefer to forget.

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.

The Ghost of Andy gives Jim a glimpse of Kyle's future as a loser because of Jim's failed attempts to help his son during a softball game.

Andy's new metal detector uncovers Jim's long lost wedding ring, causing a problem for Jim, who's been hiding the fact that he lost it for years.

Lily asks Robin and Ted for advice when she and Marshall consider having a baby.

Robin rediscovers a group of single girls who like to party; Ted pitches Barney a design for his company's headquarters.

Ted and Barney pick a fight with a bunch of guys to improve their friends' perceptions of them.

Ted goes out of his way to keep his sister out of trouble when she comes to visit; Marshall introduces Robin to a Minnesota-themed bar.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

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

Andy's new metal detector uncovers Jim's long lost wedding ring, causing a problem for Jim, who's been hiding the fact that he lost it for years.

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.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Lily asks Robin and Ted for advice when she and Marshall consider having a baby.

Robin rediscovers a group of single girls who like to party; Ted pitches Barney a design for his company's headquarters.

Ted and Barney pick a fight with a bunch of guys to improve their friends' perceptions of them.

Ted goes out of his way to keep his sister out of trouble when she comes to visit; Marshall introduces Robin to a Minnesota-themed bar.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

Physicists and best friends Leonard and Sheldon learn about the social aspects of life through their relationships with the free-spirited beauty who moves in next door.

The Ghost of Andy gives Jim a glimpse of Kyle's future as a loser because of Jim's failed attempts to help his son during a softball game.

Andy's new metal detector uncovers Jim's long lost wedding ring, causing a problem for Jim, who's been hiding the fact that he lost it for years.

Brent and Lacey try to figure out their relationship; Emma's on the warpath.

Brent finds out his parents never married; Lacey's mission to help Oscar.

Davis regains sense of smell; Brent realizes how little he knows about his friends.

Oscar asks for Karen's help in getting culinary revenge against Emma.

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.

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

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 to not ruin his new relationship with Bernadette.

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

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.

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.

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

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

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 to not ruin his new relationship with Bernadette.

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

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.

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.

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

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

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 to not ruin his new relationship with Bernadette.

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

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.

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.

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

Karen drives everyone crazy with her new hacky-sack; Oscar finds a pair of pants.

Brent buys a big-screen television; Lacey buys jewelry from Wanda.

Wanda's excited about getting a tattoo; police crack down on jaywalkers.

Brent installs a security camera at Corner Gas; Davis gets a stun gun.

Wanda is the new bingo caller; Karen is suspended from the police force.

Hank is unaffected by the mosquitoes; Lacey contributes to the time capsule; Oscar goes back to work at Corner Gas.

Ross becomes jealous when he hears Rachel's new co-worker (Steven Eckholdt) whispering sweet nothings to her.

Running into Richard at the video store tests Monica's willpower; Joey agrees to read "Little Women.".

Phoebe reunites with her former singing partner (E.G. Daily); Chandler dates a woman (Sherilyn Fenn) who has a prosthetic limb.

Phoebe has trouble communicating with her new boyfriend; Ross seeks solace at a party after a bitter fight with Rachel.

Ross tries to prevent Rachel from learning his disturbing secret; Monica, Phoebe, Chandler and Joey spend a night eavesdropping.

Excluded from Rachel's ski trip with her pals, lonely Ross visits his ex-wife (Jane Sibbett); Phoebe's cab runs out of gas and the stranded gang turns to Ross for help.

Desperate, Monica agrees to a date with one of her restaurant customers; Phoebe's younger brother visits.

Rachel goes on her first date after splitting with Ross; Joey's new flame doesn't seem interested in him.

Rachel regrets making a date for Chandler and her boss, Joanna (Alison LaPlaca); Joey's interest in Kate (Dina Meyer) intensifies.

Monica considers accepting a dream job in Pete's (Jon Favreau) new restaurant but fears there is more to the deal.

The gang goes to the opening night of Joey's plays; Rachel brings a date (Ben Stiller) to make Ross jealous; Joey's play gets terrible reviews, but his co-star provides some comfort.

Afflicted with a mysterious skin condition, Ross seeks advice from Guru Saj; Monica can't decide about Pete.

To her horror, Monica's boyfriend plans to fight; the friends are intrigued by a conversation between two strangers.

The gang spends a weekend at a beach house; in search of her father, Phoebe meets a family friend (Teri Garr) with links to her family's past.

Ross becomes jealous when he hears Rachel's new co-worker (Steven Eckholdt) whispering sweet nothings to her.

Running into Richard at the video store tests Monica's willpower; Joey agrees to read "Little Women.".

Phoebe reunites with her former singing partner (E.G. Daily); Chandler dates a woman (Sherilyn Fenn) who has a prosthetic limb.

Phoebe has trouble communicating with her new boyfriend; Ross seeks solace at a party after a bitter fight with Rachel.

Ross tries to prevent Rachel from learning his disturbing secret; Monica, Phoebe, Chandler and Joey spend a night eavesdropping.

Excluded from Rachel's ski trip with her pals, lonely Ross visits his ex-wife (Jane Sibbett); Phoebe's cab runs out of gas and the stranded gang turns to Ross for help.

Desperate, Monica agrees to a date with one of her restaurant customers; Phoebe's younger brother visits.

Rachel goes on her first date after splitting with Ross; Joey's new flame doesn't seem interested in him.