Life gets complicated when Stuart starts bringing his new girlfriend home; Penny and Leonard talk about starting a family; Koothrappali explores an arranged marriage.

When Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend, Leonard takes matters into his own hands; Bernadette and Penny take Raj's fiancee out to dinner to get to know her.

When Amy doesn't have time to work on super-asymmetry, Sheldon goes to great lengths to ensure she's available; Koothrappali doesn't want Wolowitz to join him in hosting a show at the planetarium.

When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party; Leonard is shocked when Penny doesn't remember their first kiss.

Leonard is caught between a rock and a hard place when he becomes responsible for distributing extra grant money; Bernadette turns the backyard playhouse into a hideaway to get away from her husband and kids.

Sheldon tries to bond with Amy's father, but when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler; Koothrappali and Anu try to get physical for the first time.

Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproved; Bernadette wants to beat Howard in a popular video game.

An injunction prevents Langley Falls from lighting its annual Christmas tree, beginning a journey for Stan to find the true meaning of Christmas.

Stan demands a grander Christmas and sets out to find a bigger tree in the forest, where he meets an untimely end; while in limbo, Stan fights the forces of good and evil.

Stan is furious when he cannot get a good seat at church on Christmas Day; a moment of divine intervention occurs when Francine tries to ease her husband's frustration; Francine is kidnapped.

Despite Francine's warning, Stan gives Steve a gun for Christmas; Steve accidentally shoots Santa Claus.

Father Donovan (Martin Mull) casts Stan and Roger in a Christmas play at the mall; Jeff and Hayley adopt a kid who turns out to be possessed.

When Steve begins acting like a spoiled brat, Stan takes him to see Grandpa Jack (Daran Norris), who shares a story about a demon (Danny Glover) who would punish naughty children on Christmas; Hayley lands a job at the airport.

Stan's wish to have principal Lewis' carefree life comes true; meanwhile, Principal Lewis has Stan's family.

Stan goes on a mission to find out who didn't bring a gift to the CIA's Secret Santa party; Steve poses as the good boyfriend for several female classmates.

The Smith's rescue Steve after he's kidnapped and taken to the North Pole, where Santa Claus is using children to mine for precious stones needed for an ancient ritual.

Snot teaches Roger about Hanukkah, prompting Roger to convert to Judaism and to try to make Hanukkah more popular than Christmas by stealing Santa Claus' power.

After Stan's plan for the perfect Christmas goes wrong, he's given a magical opportunity to make things right.

When Roger has his famous Christmas sex party stolen from him, the results are monstrous; Stan creates a magazine for men.

Bullock throws a private, star-studded Christmas party the same night as the CIA work party; Stan and Klaus are determined to get in, by any means necessary.

Sheldon and Missy try to help the family's finances; Mary struggles to find her footing without the church.

Sheldon must choose sides in an ethical dilemma; Mary tries her hand at writing; Mandy needs a new place to live.

Sheldon makes a terrifying mathematical discovery while tutoring Billy; Mary is jealous of Missy's relationship with Mandy and MeeMaw.

At college, Sheldon decides to expand his responsibilities and become a dorm resident adviser; Meemaw and Dale make a sketchy business deal; Mary and George Sr. rekindle their romance.

George Sr. is asked to help with the football team; Mandy discovers Georgie and Meemaw's secret business.

Sheldon's search for a comic book leads him to a breakthrough; Georgie and Mandy have an uncomfortable first encounter with her parents.

Sheldon's database invention puts him at odds with the university; the church takes issue with Meemaw's video store.

Sheldon considers dropping out of college to focus on building his database; George Sr. is frustrated when someone else gets credit for his football wins.

Mary struggles to make new friends; Mandy pushes Georgie to date another woman.

Phoebe's romantic meeting with an old friend (Charlie Sheen) is stalled by a case of the chickenpox; Ben celebrates his first birthday; Monica frets about her relationship with Richard (Tom Selleck).

Rachel is a bridesmaid at her ex-fiancé's wedding; she has flashbacks of her own failed wedding day; Monica and Richard's relationship is jeopardized when the subject of children is discussed.

Monica is distraught after her break-up with Richard; Chandler and Janice begin seeing each other again; Ross tells Rachel and Chandler about his "Princess Leia" fantasy.

In a race against the clock, Ross tries to get the gang dressed and ready for a black-tie benefit at the museum.

Phoebe dates a man who thinks he's stalking her twin sister, Ursula; Ross and Rachel give Chandler "boyfriend" lessons.

Chandler tries to get over his fear of commitment; Phoebe poses as Joey's agent after she forgets to tell him about an audition.

Phoebe tries to bond with her half brother, Frank Jr., by offering to buy a massage; Ross spots Isabella Rossellini; 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.

Joey sees Janice kissing her husband, whom she is divorcing while she dates Chandler; Rachel's father clashes with Ross.

Chandler is devastated after Joey tells him he saw Janice kissing her ex-husband; Monica accidentally bumps Ben's head into a post when she and Rachel babysit; Phoebe is paranoid if she goes to dentist someone she knows will die.

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.

A VHS tape from Sheldon's past inspires him not to give up; Bernadette turns into a pageant mom when she tries to help Wolowitz with his Magic Castle audition.

Penny and Leonard organize a paintball game, which results in mayhem when Sheldon becomes jealous of Amy; Koothrappali catches Anu with her ex-boyfriend; Stuart doesn't want to move in with Denise.

Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.

Sheldon and Amy are thrilled when their super asymmetry theory is proven by two physicists, until they try to kick Amy off the Nobel nomination; Bernadette has a big success at work.

Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law; Leonard is disappointed when his friends exclude him from a scientific project.

Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend; Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip aboard the "vomit comet.".

The gang uses deception and betrayal to make it to the one open seat at Wil Wheaton's celebrity Dungeons and Dragons game with William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith.

When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is left in charge of the kids; Sheldon finds a book about experimenting on kids.

When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold; Halley's fear of the dark leads to opportunity and conflict.

The weight of winning a Nobel Prize weighs heavy on Amy's shoulders; Koothrappali and Wolowitz try to relive the good old days after Wolowitz buys a scooter that looks like the one he had years ago.

Koothrappali is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life; Leonard wants to be the principal investigator on a plasma physics study.

Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in or not; Wolowitz learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.

Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him, until he finds out the real reason she's there; Denise and Stuart overstay their welcome at the Wolowitz house.

Sheldon and Amy await big news.

Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; Koothrappali makes a new friend; the gang travels together into an uncharted future.

Sheldon learns the university is building a database without him; Mary takes care of a bedridden Mandy and Meemaw.

Mary butts heads with Mandy's mother, Audrey; Sheldon attempts male bonding.

Paige drags Sheldon to a college party; Missy gets caught in a lie.

The Coopers can't be found as Mandy goes into labor; Sheldon is excited about the launch of his database.

Sheldon confronts the failure of his database; Georgie and Mandy struggle as new parents; Missy feels forgotten.

Missy steals her dad George's truck and runs away from her house; she hits the road with her friend Paige.

Georgie goes on a birthday date; Mary confronts Brenda about her relationship with George; Sheldon takes an interest in Missy's favorite TV show.

Sheldon wants to search for life on other planets; Mandy answers Georgie's marriage proposal; Missy is caught between two friends.

Mandy gets an exciting job opportunity; Sheldon worries that he's falling behind; Georgie takes his daughter to work.

The gambling room gets broken into; Sheldon wants to study abroad; Missy makes a new friend.

Richie (Bryton McClure) invites a homeless man for Christmas; Steve (Jaleel White) performs an angelic act for Laura (Kellie Shanygne Williams).

Carl allows Steve to decorate the Winslow house for the Christmas display contest.

Carl (Reginald VelJohnson) tries to cut his own Christmas tree but ends up getting lost in the woods with Steve (Jaleel White).

Urkel's (Jaleel White) new job as a gift-wrapper at the mall complicates his relationship with Myra (Michelle Thomas).

Claire and Phil threaten to take away Christmas when the kids get into trouble; Cameron and Mitchell take Lily to have her first picture taken with Santa.

The family puts together a quick Christmas celebration when they realize they won't be together on the actual day.

Jay and Manny set out to cut down their own Christmas tree; Gloria is on edge when her mother visits; Mitchell does last-minute shopping to find the perfect gift for Lily.

Gloria rents a cabin in the mountains where the family can celebrate a picture-perfect Christmas, but unexpected factors complicate the holiday; Jay makes an announcement.

Manny and Luke's efforts to put on the school's winter dance get complicated due to a texting error; Gloria, Claire, Mitchell and Cam volunteer at the dance while Jay tries to get out of it by pretending he wants to spend time with Phil.

Hayley works to figure out the best time to give the family a Christmas gift they will never forget; Phil borrows the family Christmas tree for a house-showing; Jay, Gloria and Joe deal with unwelcome holiday visitors.

Mitchell suspects Cameron has an ulterior motive for keeping everyone happy for Christmas dinner; Claire tries to dodge Jay's job offer to work at his dog bed company; Luke has to deal with the consequences of kissing Manny's ex-girlfriend Sherri.

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

Phoebe, hoping for a Christmas family reunion, travels to upstate New York in search of her biological father.

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 struggles to maintain a long-distance relationship; Chandler's well-intended attempts to get Rachel a date seem to miss the mark; Monica's plan to assert some authority at her new restaurant goes awry.

Phoebe helps the Salvation Army and learns some truths about New Yorkers; Rachel gets a date with her neighbor who has a close relationship with his sexy sister; Joey tries to write a play in which he can be the star.

Janine invites Joey, Monica and Ross to a TV taping; Phoebe and Rachel want an early glimpse at their Christmas gifts.

Rachel finds it embarrassing that she is paying the way for her hunky new boyfriend (Eddie Cahill), who is also her assistant at work.

Ross' attempts to introduce his son, Ben, to Hanukkah are thwarted by the tyke's like of all things Christmas.

Chandler is aghast when Monica buys expensive boots; Phoebe discovers that Ross' son attends school with Sting's son.

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

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).

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

During a game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Koothrappali.

Leonard and Wolowitz clash over a work emergency; Amy throws a Victorian Christmas party which Sheldon resents.

Sheldon and Amy visit Penny and Leonard after the holidays and tell them about their terrible trip to Texas.

Alex Windsor challenges Mercedes Mone for her RevPro Undisputed British Women's Title; Speedball Mike Bailey fights Jack Perry and Kazuchika Okada faces Kevin Knight in Continental Classic Gold League action.

All Elite Wrestling continues to inject new spirit, freshness and energy into mainstream wrestling featuring a world-class roster of diverse male and female wrestlers.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

In the 1940s, little Ralphie tries to convince his parents to get him a Red Ryder range-model BB gun for Christmas. Narrated by Jean Shepherd.

Ralphie reconnects with old friends when he returns to his childhood home in Indiana to give his kids a magical Christmas like the one he had growing up.

A man makes a deal with a mischievous elf who casts a magic spell that brings the 12 Days of Christmas to life.

Ralphie reconnects with old friends when he returns to his childhood home in Indiana to give his kids a magical Christmas like the one he had growing up.

A man makes a deal with a mischievous elf who casts a magic spell that brings the 12 Days of Christmas to life.

Mitchell accidentally knocks over an urn containing the ashes of Cam's beloved pet pig, Lilly; Cam tries to catch Mitchell in a lie.

Rachel crosses swords with her temporary replacement (Dermot Mulroney) at the shop; Phoebe wreaks havoc on the set of Joey's soap opera.

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 Web site; 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.

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

Phoebe, hoping for a Christmas family reunion, travels to upstate New York in search of her biological father.

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 struggles to maintain a long-distance relationship; Chandler's well-intended attempts to get Rachel a date seem to miss the mark; Monica's plan to assert some authority at her new restaurant goes awry.

Phoebe helps the Salvation Army and learns some truths about New Yorkers; Rachel gets a date with her neighbor who has a close relationship with his sexy sister; Joey tries to write a play in which he can be the star.

Janine invites Joey, Monica and Ross to a TV taping; Phoebe and Rachel want an early glimpse at their Christmas gifts.

Rachel finds it embarrassing that she is paying the way for her hunky new boyfriend (Eddie Cahill), who is also her assistant at work.

Ross' attempts to introduce his son, Ben, to Hanukkah are thwarted by the tyke's like of all things Christmas.

Chandler is aghast when Monica buys expensive boots; Phoebe discovers that Ross' son attends school with Sting's son.

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

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).

Leonard is happy to meet new neighbor Penny, but his roommate thinks he is chasing an impossible dream.

Leonard volunteers to sign for a package, hoping to make a good impression on Penny.

Unhappy to learn that Penny is seeing someone, Leonard summons the courage to ask another woman on a date.

Getting fired gives Sheldon the opportunity to explore life beyond physics, but when he spends his time weaving ponchos and acting like a shut-in, Leonard calls Sheldon's mother for assistance.

Leonard, realizing his pursuit of Penny is fruitless, has an unexpected encounter with a fellow scientist (Sara Gilbert).

Leonard, Sheldon, Wolowitz and Koothrappali attend Penny's Halloween party.

Penny sleeps on Leonard and Sheldon's couch when Wolowitz seduces her friend and takes over her apartment; in need of a fourth member, the guys ask Penny to join their "Halo" team.

Captain America (Chris Evans), the Black Widow (Scarlett Johansson) and a new ally, the Falcon, face an unexpected enemy as they struggle to expose a far-reaching conspiracy that puts the world at risk.

When alien invaders lay waste to planet Earth, it's up to a select group of survivors to make a last-ditch stand. Fighting superior technology, mankind's best weapon is the will to survive.

Perseus, the son of Zeus, is caught in a war between gods and is helpless to save his family from Hades. With nothing left to lose, Perseus leads a dangerous quest to prevent Hades from overthrowing the king of the gods and laying waste to Earth.

Murr and Q are going on a trip down memory lane and watching extended never-been-seen-before clips from the last few years.

Sal, Q and Murr kick off another season of antics by getting themselves stuck in a vent system and confusing customers at a bagel shop; our losing Joker will face humiliation in a punishment that's tough to swallow.

The Jokers are back working as dry cleaners and TV producers, but one of them can't keep it together and must endure concertgoers who have escaped their enclosures.

The Jokers are locked in a supply closet and must decide who's endured the worst punishments to escape; as they argue over physical, embarrassing, and personal punishments, old clips resurface, and tensions rise.

The Jokers face off by recording voiceover for a fake video game and playing the concerned parent writing to their kid's school; but one Joker burns out with a punishment that's gotta sting.

Joey Fatone interviews the Jokers for a fake documentary; the guys react to an overly emotional phone call for an underwhelming reason; one Joker checks out and is forced into being the world's worst grocery store employee in his punishment.

The Jokers hit the grocery store aisles dressed in absurd disguises, then train someone in using aggressive phone tactics for charity donations. The losing Joker must subject themselves to scientific probing into their hidden emotions.

The Jokers can't contain the laughs as they answer survey questions for a new snack food and present the world's worst pharmaceutical ads; the loser will work up a sweat in a punishment that's all pain, no gain.

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.

The gang heads to Barbados for a paleontology convention where Ross is the keynote speaker; David (Hank Azaria) prepares to propose to Phoebe, but ex-boyfriend Mike (Paul Rudd) is not yet out of the picture.

The gang heads to Barbados for a paleontology convention where Ross is the keynote speaker; David (Hank Azaria) prepares to propose to Phoebe, but ex-boyfriend Mike (Paul Rudd) is not yet out of the picture.

In Barbados, Monica, Chandler and Phoebe eavesdrop on their friends' passionate encounters; Monica styles her hair to look like a blowfish; Phoebe and Mike rekindle their romance.

Ross drinks too much alcohol at dinner with Rachel, Joey and Charlie; Frank Jr. (Giovanni Ribisi) cannot cope with his precocious triplets.

Rachel and Joey nervously anticipate their first real date; Monica and Phoebe try to avoid an obnoxious friend with a fake British accent; Ross emerges from a tanning booth with a two-toned appearance.

While on a tour of the White House with his young daughter, a Capitol policeman springs into action to save his child and protect the president from a heavily armed group of paramilitary invaders.

When alien invaders lay waste to planet Earth, it's up to a select group of survivors to make a last-ditch stand. Fighting superior technology, mankind's best weapon is the will to survive.

Captain America (Chris Evans), the Black Widow (Scarlett Johansson) and a new ally, the Falcon, face an unexpected enemy as they struggle to expose a far-reaching conspiracy that puts the world at risk.

Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner) must pick a side when a feud between Captain America (Chris Evans) and Iron Man (Robert Downey Jr.) leaves the Avengers in turmoil.

Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner) must pick a side when a feud between Captain America (Chris Evans) and Iron Man (Robert Downey Jr.) leaves the Avengers in turmoil.

While on a tour of the White House with his young daughter, a Capitol policeman springs into action to save his child and protect the president from a heavily armed group of paramilitary invaders.

Attention shoppers; the Jokers make mischief by taking unflattering pictures of grocery store patrons, then posing as horrible employees at the Yeti store; tonight's loser must meat his fate in a punishment.

The Jokers play unprofessional actors in a fake commercial then make wild assumptions about other mallgoers; one Joker breaks and is tasked with becoming the strictest security guard imaginable in his punishment.

The Jokers pretend to be medical students in training with standardized patient actors, then play the hero and break up a public fight, hoping to earn applause; one Joker has to put his hips where his mouth is and settle a bet of his own making.

Sal, Q and Murr are crashing and burning into product displays and hiding in tight spaces, but one of them must face the music with celebrity guest Bret Michaels.

The jokers give unsolicited etiquette advice and live tape strange product reviews; one lucky joker takes all the blame for celebrity guest Post Malone.

Rachel gets Monica and Chandler to delay their trip to Vermont for Emma's first birthday bash.

Rachel feels like her younger sister, Amy, is finally on the verge of making a major change in her attitude; in order to help Amy become a more responsible person, Rachel overrides Ross' strong protests and allows Amy to baby-sit Emma.

When Ross interviews with Charlie's ex-boyfriend (Greg Kinnear) for a prized grant, the doctor makes a shocking stipulation; Chandler lies about watching Joey's bizarre audition tape.

Monica and Chandler fuss over their apartment as they expect a visit from the adoption worker, Laura; Phoebe and Mike opt for a small wedding and donate the extra money to a children's charity.

Monica prepares a Thanksgiving feast for the gang, then becomes enraged when everyone shows up late; Phoebe convinces Rachel to enter Emma in a baby beauty contest.

A prospective birth mother (Anna Faris) labors under a misconception about Monica and Chandler's respective occupations.

Rachel and Phoebe spot Chandler getting into a car with a mystery blonde; the friends reminisce about memorable moments.

Joey appears as a celebrity contestant on "$100,000 Pyramid"; Monica and Rachel hire an ungainly stripper for Phoebe's bachelorette party.

Though broke and lovelorn, a woman (Kristen Wiig) takes on the strange and expensive rituals associated with being her best friend's maid of honor.

Dissatisfied with retirement, a 70-year-old widower becomes an intern at an online fashion site and develops a special bond with his young boss.

On a blind date, Koothrappali discovers that he can talk to the opposite sex after a few drinks, but his date takes an interest in Sheldon.

Penny tries to mediate when Sheldon and Leonard disagree on whether to present their joint findings at a physics conference.

Leonard and Sheldon try to avoid seeing Penny perform after hearing her sing, but the elaborate lie Sheldon tells leads to an unexpected result.

Leonard and the boys avoid Sheldon when he gets sick, leaving Penny to nurse him back to health.

Sheldon and Leonard look for a way to derail a 15-year-old physics prodigy's research.

When Sheldon tries to prove his mental superiority as they train for the Physics Bowl, the guys kick him off the team and bring his nemesis (Sara Gilbert) aboard.

Leonard and the guys buy a time machine prop from a classic movie; Penny tells the guys their obsession with comics and toys is pathetic.

Leonard devises a plan to eliminate his rivals when he, Wolowitz and Koothrappali all fall for Sheldon's twin sister, but his plan backfires when Sheldon decides to choose who his sister dates.

Penny learns that Leonard does not celebrate birthdays, so she plans a surprise party; Sheldon unexpectedly gets to live out one of his biggest fantasies in an electronics store.

When Leonard finally works up the courage to ask Penny out on a date, they each turn to Sheldon for advice.

Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant.

After seeing Penny with a handsome new guy, Leonard rushes into a rebound relationship with Sheldon's nemesis, Leslie Winkle.

Sheldon creates a monster when he introduces Penny to online gaming.

Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article.

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

Though broke and lovelorn, a woman (Kristen Wiig) takes on the strange and expensive rituals associated with being her best friend's maid of honor.

Dissatisfied with retirement, a 70-year-old widower becomes an intern at an online fashion site and develops a special bond with his young boss.

Carl endures hours trapped in a train with an unwitting stowaway, Urkel.

After a cosmetic makeover, Myrtle decides she likes her old self better.

Laura faces a dilemma when both Urkel and Stefan ask for her hand in marriage.

Laura and Urkel postpone their wedding when they launch him into space to test his latest gadget.

Mandy surprises Georgie with a spa weekend; Sheldon prepares for his summer in Germany.

Sheldon and Mary head to Germany while the rest of the Cooper family braves a tornado that is heading straight for Medford.

News of the tornado reaches Sheldon and Mary in Germany; with the Cooper house in chaos, Missy steps up.

Sheldon realizes he is the weakest student in his class; Meemaw looks to expand her gambling business.

Sheldon explores Germany behind Mary's back; Missy attempts to pull a fast one on George Sr.; Meemaw and Dale adjust to living together.

Missy steps up; Mary has a surprise for George; Sheldon finds his dorm occupied.

A blizzard causes Phoebe and Mike's wedding to spiral out of control; uptight Monica steps in as her friend's wedding planner, then drives everyone crazy.

Monica and Chandler show Erica the tourist sights; they learn their baby's biological father might be an unsavory character; Joey begs Phoebe to teach him how to speak French before an audition.

Rachel goes to a job interview at a restaurant and winds up sitting next to her current boss; Joey feels abandoned because Monica and Chandler are leaving.

Ross tries to win back Rachel's job with her former fashion employer; Phoebe tries to keep Joey from learning about his agent's death; Monica and Chandler make a horrifying discovery.

One of the guys becomes offended when Rachel does not give him the same goodbye she gives the others.

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

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

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

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

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

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

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

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

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.

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.

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).

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.

Mitch and Cam fight the effects of sleeping pills while rushing to catch a flight; Haley and Rainer re-evaluate their relationship; Phil and Claire meet Alex's new boyfriend when they pay her a surprise visit.

Phil gets the Dunphy clan to show up in costume for Frank's Roaring '20s-themed wedding; Jay masters the art of saying no; Cam stands up to his sister, Pam.

Gloria, Claire, Haley, Alex, Lily, Luke and Manny show support for gender equality and the women's movement in their own ways; Jay and Phil butt heads over their parking attendant; Cam feels jealous when Pam prefers Mitchell's help with the baby.

Mitch and Jay end up at the same resort when they separately seek out a retreat from the family; Phil and Claire struggle to enjoy empty-nester life; not knowing what to do with himself while Mitch is away, Cam drops in on Gloria.

Jay picks up the pieces after Manny's father takes him out to celebrate graduation; the family prepares for Luke and Manny's big day.

Jay forces the family to take their vacation on a house boat on a lake; Mitchell runs into an old flame; Cam must avoid the sun; Phil and Claire try out some adventurous excursions; the kids' quest for a good time goes awry.

When Stan learns that his rival Chris White is applying to be the deacon at their church, he decides he wants the position for himself.

Stan tries to curry favor with Bullock (Patrick Stewart) in hopes of scoring a promotion, but learns a secret about his boss's new woman in the process.

Phil and Claire realize that Alex may be more self-sufficient in college than they thought; Manny works to avoid a tearful goodbye after Gloria and Jay move him into his dorm; Haley gets an unexpected opportunity.

Phil believes he'll have a day of bad luck after failing to successfully complete his daily superstition; Mitch is certain that Cam is undermining him during their kitchen renovation; Jay is determined to get Gloria to admit she was in an accident.

Jay's friend Shorty visits from Costa Rica but spends more time with Gloria than Jay; Alex decides to prove to Claire that her relationship with Ben is a sexual one.

Phil and Claire start to question their enthusiasm for Halloween when no one else seems to feel the same; Mitch confronts Jay about how long the kitchen remodel is taking; Cam oversteps his boundaries as a house guest.

Sheldon helps his roommate try to beat the stock market; Missy and Billy Sparks throw a party; Mary finds a new church.

Georgie and Mandy get married.

Sheldon studies to be Meemaw's lawyer when she is put on house arrest; the Coopers have a plumbing emergency.

Sheldon's published paper leads to a frenzy of grad school recruiting; Georgie tries to speak more properly in front of his daughter.

Meemaw gets assigned a tough probation officer; Georgie takes marriage advice from his father-in-law.

George Sr. is worried that Mary wants another baby and gets a vasectomy behind her back; Dr. Linkletter and Dr. Sturgis go to Sheldon for science tutoring.

George Sr. gets an exciting job offer; Sheldon prepares for his move to California.

Sheldon leaves East Texas for the California Institute of Technology following the death of his father, George Cooper Sr.

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

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

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

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

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

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

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

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

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

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

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

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

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

Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette.

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.

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.

Leonard is horrified when his mother (Christine Baranski) visits.

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.

Claire throws a 10th anniversary party for Jay and Gloria; Phil plans a magic trick in which Gloria appears out of thin air in her wedding dress.

Jay gives a Thanksgiving toast that honors the family's successes, although everyone knows it isn't quite true; everyone tries to hide things about their perceived triumphs; Phil works hard to master a magic trick to prove he's not a failure.

The family recount all their biggest celebrity encounters; Phil shows a house to his musical hero; Jay's day at jury duty takes an unexpected turn; Manny's encounter with his favorite playwright doesn't go as expected.

After leaving his real estate firm to strike out on his own, Phil decides a solo camping trip in the wild will be just what he needs to boost his confidence; Mitchell's plan to teach Cam and Lily each a lesson backfires.

When Claire lands a big opportunity for Pritchett's Closets, Jay expects validation for his contribution; Pam's ex-boyfriend shows up and Mitchell sees this as an opportunity to get Pam out of the house; Luke and Alex find a business opportunity.

Claire's request to build a "She Shed" in the backyard is denied by the homeowners association and only Luke and Phil know the real reason why; Pameron lets Cam in on a family secret, which forces him to visit Mitch's therapist.

After Phil experiences intense stomach pains, Gloria has to rush him to the hospital for an emergency surgery and rallies the entire family to be by his side.

Luke goes missing after a night out; Haley is desperate to land an interview for a popular lifestyle website.

Phil thinks that Gloria is upset at Jay for dropping the ball on Valentine's Day, so he convinces Jay to spice things up with a little role playing; Mitch and Cam must make things right when they unwittingly ruin Luke's Valentine's Day date.

When Jay overhears Gloria on the phone talking about spanking, he assumes she is frustrated in the bedroom; Mitchell and Cam throw a party to rub Mitchell's new job in Cam's friends' faces.

The family goes on a wine tasting trip and stays in Haley's new boss's country house; Gloria and Mitch are invited to a party at Oprah's house but can't bring anyone else.

Haley's astrophysicist boyfriend comes to meet the family, setting Claire and Phil off in a competition about which one of them is smarter; Mitch and Cam go on a yoga retreat.

A little girl develops extraordinary mental abilities, despite neglectful parents and a brutal headmistress.

Soon after their blind date goes disastrously wrong, two single parents (Adam Sandler, Drew Barrymore) and their children end up sharing a suite together at an African resort.

When a book editor faces deportation back to Canada, she declares that she's actually engaged to her put-upon assistant, who she's tormented for years.

Soon after their blind date goes disastrously wrong, two single parents (Adam Sandler, Drew Barrymore) and their children end up sharing a suite together at an African resort.

When a book editor faces deportation back to Canada, she declares that she's actually engaged to her put-upon assistant, who she's tormented for years.

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.

All Elite Wrestling continues to inject new spirit, freshness and energy into mainstream wrestling featuring a world-class roster of diverse male and female wrestlers.

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

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 Gloria's ex-boyfriend stops by for a visit, his striking resemblance to Manny makes Jay wonder; Phil agonizes over getting the perfect anniversary gift for Claire; Lily gets into a fight at school over bras.

Haley's boss tries to buy Gloria's salsa; Mitchell gets Cam the police ride-along he's always dreamed of.

When Dede drops by unexpectedly, Mitchell and Cam come to a realization about her effect on their lives; Phil, Luke, Alex and Haley all have different bad news to break to Claire and compete about when to do it.

Haley meets Arvin's parents but fate leads to an unexpected reunion with all of her ex-boyfriends; the family goes to a nursing home to visit with Jay's sister; Phil, Cam and Gloria end up getting trapped in the home's basement.

Mitchell sneaks out to Hero-Con with Phil; Gloria's dinosaur party for Joe is ruined when her nemesis upstages her with a far bigger and better party next door.

The family gets together for the annual Fourth of July parade where Jay acts as the grand marshal; Haley's farewell to Arvin doesn't go as well as expected and she is distracted by the return of an old flame.

Haley looks to Mitch and Cam for relationship advice; Gloria suspects Manny's Canadian girlfriend is made up and tries to find out the real truth.

Phil stumbles into an exciting new career after visiting Luke's college; Claire deals with her dad and the merger of Pritchett's Closets with a tech-savvy, hipper company; Mitch's new high-profile case is marred by an unflattering courtroom sketch.

Haley is forced to make a decision; Manny returns to college and dorm life; Sherry may be overstaying her welcome at Jay and Gloria's.

The families celebrate another epic Halloween and receive huge, unexpected news.

When Phil learns that his real estate class will be canceled if any additional students drop it, he turns on his powers of charm and flattery to keep one particular student from leaving; Jay tries to set boundaries with a fellow parent.