When a doubting young boy takes a train ride to the North Pole, he embarks on a journey of self-discovery that shows him that the wonder of life never fades for those who believe.

When a doubting young boy takes a train ride to the North Pole, he embarks on a journey of self-discovery that shows him that the wonder of life never fades for those who believe.

The yuletide season brings headaches for Santa Claus (Paul Giamatti), who bails his ne'er-do-well brother Fred (Vince Vaughn) out of trouble and puts him to work in his factory.

The yuletide season brings headaches for Santa Claus (Paul Giamatti), who bails his ne'er-do-well brother Fred (Vince Vaughn) out of trouble and puts him to work in his factory.

Dylan and Jamie decide to try something new and take advantage of their mutual attraction but without any emotional attachment. Physical pleasure without the entanglements. They soon realize romantic stereotypes might exist for a reason.

Claire and Phil worry when they learn Luke has befriended their cantankerous old neighbor; Jay tries to avoid attending a symphony concert with Gloria and Manny; Haley baby-sits Lily.

Cameron is overzealous in his planning of the spring musical performance at Luke and Manny's school; Jay's brother visits; Phil convinces the family to be in his new ad.

Mitchell and Cameron try to choose who would best take care of Lily should anything happen to them.

Gloria and Claire plan a Mother's Day hike with the kids; things becomes awkward when Phil catches Jay in a moment of weakness.

Phil and Claire shock the kids by switching parenting roles for a day; Jay gives advice to an entrepreneur about his dog-training business; Cameron has the flu, leaving Mitchell to decide what to do with their Lady Gaga tickets.

As the family prepares for Alex's middle-school graduation, Jay tries to hide a cosmetic-procedure mishap, Cameron is upset about Mitchell laughing at his expense, and Phil antagonizes Claire.

Phoebe's brother (Giovanni Ribisi) asks her to carry a baby for him and his wife; Chandler gets lessons in love; Joey finds himself in a class struggle.

Phoebe undergoes an embryo implant procedure to become a surrogate mother for her brother (Giovanni Ribisi) and his wife (Debra Jo Rupp); Monica and Rachel wager their apartment in a trivia game against Chandler and Joey.

Rachel's setback at work leads to a new romantic interest; Chandler is jealous of Kathy's onstage co-star.

A visit to a strip joint fails to cheer up Chandler; Rachel gets Ross to go to an opera; Charlton Heston finds Joey in a compromising position during a movie shoot.

Ross takes up rugby to impress Emily (Helen Baxendale); Chandler sets up a ruse to avoid his former girlfriend Janice (Maggie Wheeler).

Feeling sad and unwanted, Santa takes the day off before Christmas; voices: Mickey Rooney, Shirley Booth; animated.

After a tornado whisks Kansas farm girl Dorothy (Judy Garland) to a magic land, she must travel to the Emerald City for help in getting back home.

When their plans for a holiday getaway fall apart, a couple (Vince Vaughn, Reese Witherspoon) must spend Christmas Day trudging to a quartet of family get-togethers.

Nothing seems to go right for young Kate, a frustrated Londoner who works as an elf in a year-round Christmas shop. But things soon take a turn for the better when she develops a growing attraction to a charming suitor who seems too good to be true.

Hoping to close a sale and save their jobs, two co-workers (Jason Bateman, T.J. Miller) must rally their colleagues to throw an epic Christmas party.

Adopted as a baby by one of Santa's elves (Bob Newhart), a man (Will Ferrell) leaves the workshop to search for his family in New York.

Adopted as a baby by one of Santa's elves (Bob Newhart), a man (Will Ferrell) leaves the workshop to search for his family in New York.

When their plans for a holiday getaway fall apart, a couple (Vince Vaughn, Reese Witherspoon) must spend Christmas Day trudging to a quartet of family get-togethers.

Hoping to close a sale and save their jobs, two co-workers (Jason Bateman, T.J. Miller) must rally their colleagues to throw an epic Christmas party.

Following a night of drinking in a ski-resort hot tub, four pals awake in 1986, getting a chance to rewrite the past.

Steve undergoes a personality change when he drinks his secret elixir.

Laura tricks a disrespectful used-car salesman; Steve is close to ruining Eddie's love life.

Sheldon joins Dr. Linkletter and Dr. Sturgis on a science road trip; Georgie continues to lie about his age.

Meemaw's gambling room becomes a success; Sheldon dips his toe in the stock market; Missy starts a business.

Sheldon gets an odd request from an old friend, Paige; George Sr. and Mary are caught in the middle of Meemaw and Dale's breakup; Georgie comes clean to Mandy.

Sheldon copes with the death of a hero; Missy wants to babysit; Georgie struggles with his big secret.

George and Mary insist on meeting the new woman in Georgie's life; Sheldon and Missy have suspicions about what's going on with their family.

Sheldon and Missy learn about Georgie's pregnancy, and the whole family promises to keep it a secret.

Rachel throws a surprise party for Emily so she can invite Joshua; Phoebe develops a craving for meat.

Ross tells Emily (Helen Baxendale) how he feels about her; Chandler and Joey suddenly receive a free adult TV channel in their apartment; Phoebe gets some surprising news about her pregnancy.

Ross has concerns about Emily's interests; Rachel's plans for Joshua are upset by a late change of venue.

Ross tries to keep Emily from returning to London; Monica and Rachel attempt to win back their apartment.

Monica and Phoebe find life in wedding attire has its charm; Rachel asks Joshua for more spontaneity.

Rachel and Ross reminisce separately about when they dated each other; the friends get invitations to Ross's wedding, but not all of them are going.

Chandler and Joey compete to be best man at Ross' wedding; Joey loses Ross' treasured wedding ring; Phoebe suffers extreme mood swings because of her pregnancy.

Rachel, Monica, Joey, Chandler and Ross go to London for the wedding where Joey meets Sarah Ferguson, the Duchess of York.

Rachel frantically tries to get to London to tell Ross that she loves him before he marries Emily; Ross' parents argue with Emily's parents, Steven and Andrea Waltham.

Ross is distraught over the wedding; Emily punches Ross and flees from the reception; Monica and Chandler try to control their passions.

Monica and Chandler are caught in a passionate embrace but try to prove it was innocent: Ross' wife won't speak to him; Phoebe feels neglected; Rachel appoints Monica as her advisor in romance.

Phoebe prepares to give birth, but the doctor makes her nervous, and Joey gets admitted in great pain.

Sheldon goes to Las Vegas to win money for science; Penny and Bernadette take Amy wedding dress shopping, but her terrible choice entangles them in a web of lies.

Sheldon's mother won't attend his wedding unless he invites his brother; the Wolowitz kids inadvertently infest Amy, Bernadette, Wolowitz and Koothrappali with pink eye.

When Amy's parents and Sheldon's family arrive, everybody is focused on making sure the wedding arrangements go according to plan -- everyone except the bride and groom.

Sheldon and Amy's honeymoon runs aground in New York; Penny and Leonard discover they are uncomfortably similar to Amy's parents; Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war.

Sheldon and Amy go crazy trying to figure out what.

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.

The family's dream of climbing Mount Everest turns into a nightmare when Stan tries to save a buck and takes them to a different, much cheaper mountain.

After an argument between Stan and Francine, he suggests they see a counselor (Jason Alexander), who hypnotizes her and reawakens her dream of being a comic; Steve brings home a potential love interest for Klaus.

Stan invites his half-brother, Rusty (Lou Diamond Phillips), over for Thanksgiving, then gets upset when he learns how wealthy Rusty is.

Stan is put in a position to make Roger accountable for his misdeeds; Hayley and Jeff move in to the Smith's house.

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

The Smith family moves into a hotel after Roger releases lethal gas into their home; Francine gets a job in construction.

Stan and Francine's predictable lives get a shot of adrenaline when they befriend a young, thrill seeking couple.

Roger asks Stan to attend an acting class, but tempers flare when they audition for the same role; Steve and his friends try to plan the ultimate slumber party.

Roger moves out of the house after an argument with Stan and is quickly replaced; Steve gets a new job at school.

Stan resorts to extreme and cruel measures to humiliate Steve and maintain his alpha-male status in the house; Hayley and Jeff turn to Principal Lewis for marriage counseling.

John and Nicole pick their favorite past teams to return for a chance at redemption and $25,000.

Wiener catchers, washed-up jocks and a pair of very familiar Italian plumbers take on the course in hopes of winning $25,000.

Steve and Laura reject the affectionate advances of their respective dates at the drive-in.

Steve (Jaleel White) tries to put some holiday spirit into the Winslow family. Reginald VelJohnson co-stars.

Steve is the center of attention at a mall when Myra begins to flirt with him.

Eddie decides to skip college in favor of a career in the entertainment business.

As the church congregation gossips about Georgie, Missy stands up for her brother; Sheldon is distracted by the family drama.

Sheldon struggles to cope with his first signs of puberty; Mary and George Sr. both hunt for new jobs; Georgie and Meemaw take a business trip across the border.

George Sr. bails Meemaw and Georgie out of jail; Sheldon and Missy meet Mandy; Mary feels unwelcome at church.

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.

Ross' estranged bride makes him an offer; Phoebe deals with traumatic memories of PBS; Monica gets upset at Chandler when he gloats about sex; Joey challenges Phoebe to perform a completely selfless act.

An exchange between Ross and Rachel threatens to break up the friends; Chandler and Monica plan a romantic weekend getaway together; Joey finds out about Monica and Chandler.

Joey gets emotional when Ross decides to move out of the old apartment; Bigfoot in the building; Emily tells Ross that she wants a divorce.

Personal habits clash when Ross moves in with Chandler and Joey; Phoebe dates a health inspector (Gregory Sporleder); Rachel schemes to get her new neighbor to ask her our on a date.

As the gang digests Monica's huge Thanksgiving meal, everyone reminisces about their worst Thanksgiving ever.

Threatening notes on Ross' lunches cause concern among his co-workers; Monica makes a literature class more challenging, to the dismay of the other students; Monica and Chandler try to keep their relationship a secret.

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.

Ross vows to try something new; Joey resolves to learn guitar from Phoebe; Rachel gives up gossiping.

Monica is put off by the laugh Chandler uses to impress his boss (Sam McMurray); Ross shocks everyone by dating Janice (Maggie Wheeler).

Phoebe meets her estranged father (Bob Balaban) at her grandmother's funeral; Joey's fondness for an expensive bag loses him an audition; Chandler tells perfectionist Monica that she is useless at massage.

Ross must prove to his boss that he is sane in order to return to work; Phoebe finds out about Monica and Chandler's relationship; Ross hunts for a new apartment.

Chandler gets nervous when everyone learns about Monica; Joey's new girlfriend (Soleil Moon Frye) gets physical; Ross moves into a new apartment but fails to impress his new neighbors.

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.

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.

The family scrambles to plan a big celebration for Jay's birthday; Phil runs into his college nemesis; Cameron gets into hot water at a bakery.

The family takes a vacation on a ranch in Jackson Hole, Wyo.; Jay faces off with a cowboy.

Mitch and Cam bring the family together to announce their plan to adopt another child.

Jay's relationship with the dog irritates Gloria; Phil and Luke try to master the tightrope; Cameron starts a juice fast.

Jay helps Manny with a school fundraiser; Claire petitions for a stop sign at a busy intersection; Phil and Luke try to create a viral video; Gloria searches for Stella.

Gloria tries to help Jay and Manny with their problems, but both are unreceptive; Claire considers running against Councilman Duane Bailey (David Cross); Cam and Mitch are the victims of a hit-and-run accident.

Phil takes Haley to visit his alma mater; Claire goes out with Mitchell and Cameron; Gloria and Jay may have to broach a delicate subject with Manny.

Gloria insists on a night of salsa dancing with Jay; Cameron goes too far when Mitchell and a friend challenge him to get a hot woman's (Leslie Mann) number; Phil builds a tree house.

After a fire destroys a neighbor's home, the whole family tries to help by organizing a community drive.

A former neighborhood resident, now rich and successful, returns for a visit; Jay thinks Manny needs constructive criticism; Mitchell questions the authenticity of Cameron's colorful childhood stories.

When Eddie is teased by the guys about his virginity, Steve steps in and eases his mind.

Eddie needs Carl's help when he is harassed by two cops; Steve wreaks havoc at the dentist.

When accident-prone Steve is blamed for a chemistry lab explosion, Laura represents him at a school trial.

Carl experiences a nightmare in which Steve and Laura are married and have Urkel look-alike children.

Steve and Carl end up in the ring as substitutes against Luke and Butch of the.

Waldo envies Eddie's scholarship; Carl fears a test he must take to get a promotion.

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 finds a police officer's badge and goes on a spree of arrests until she meets up with the owner; Joey thinks he's in love with Monica; Ross buys a couch but won't pay to have it delivered.

Rachel worries about a kiss she gives to a job interviewer (Steve Ireland); Monica observes Phoebe's romantic bliss; Joey is arrested for stalking a sexy neighbor.

Rachel tries to impress her boss by smoking, which gives Chandler fond memories of his former addiction; Ross's son and Joey audition for the same part in a commercial.

Ross competes with Chandler for the attentions of a pizza deliverywoman (Kristin Dattilo-Hayward); Joey discovers that his guest-starring role on.

Joey tries to save Ross' life when he thinks he hears gunshots while on patrol with Phoebe's police officer boyfriend.

Monica interrupts Joey and Ross' friendly game of catch; Gary (Michael Rapaport) asks Phoebe to move in with him.

Joey lands his first lead role and finds his movie crew in a bind; Rachel gets an eye infection; Phoebe can't quite remember why she hates Ross.

The gang surprises Joey by joining him in Las Vegas on a film shoot; a winning streak leads Chandler to press his luck with a proposition.

The gang surprises Joey by joining him in Las Vegas on a film shoot; a winning streak leads Chandler to press his luck with a proposition.

Hung-over Rachel and Ross wonder if they got married while in Vegas; Monica and Chandler search the Strip for signs that they are altar-bound.

Ross seeks Phoebe's advice to help him sort out the legal status of his relationship with Rachel; Monica and Chandler plan to move in together.

Ross has Rachel on his mind when he gets between feuding Monica and Chandler; Joey advertises for a specific roommate.

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.

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.

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.

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

When Phil misses a call from his doctor with test results, he immediately assumes the worst; Javier stops by to take Manny to the horse races; Mitchell's winning of an environmental law award sparks a competition.

Claire and Jay's competitive streaks lead them to take over their kids' school projects; Phil asks Haley and Gloria to help him with a presentation; Mitch and Cam meet with prospective birth mothers.

Claire prepares for her debate with Duane Bailey; Mitch and Cam try to clean up Lily's language before her turn as a flower girl; Jay blames Stella's strange behavior on Gloria.

Claire thinks Phil's new business partner (Greg Kinnear) is blatantly inappropriate, but Phil doesn't notice; while their house is being fumigated, Cameron and Mitchell stay with Jay and Gloria.

After selling a house to Mitch and Cameron's friends, Claire and Phil plan a celebratory dinner; overindulging in drinks leads to over sharing.

Mitchell ruins one of Jay's proudest moments; Phil overhears something about one of his daughters; Gloria accidentally discovers Claire's secret.

Mitchell feels pressured to make Cameron's birthday extra special; Jay's manliness comes into question; the girls interfere with Phil's leap day plans.

Cameron runs into his estranged ex-clown partner (Bobby Cannavale); another real estate agent (Ellen Barkin) snags a listing that Phil was trying to land; Jay and Gloria are suspicious when Manny makes a new friend.

On Election Day, the family does some last-minute campaigning for Claire; Claire experiences technical difficulties during interviews.

Claire tries to help Luke cope with the death of a neighbor; Phil and Alex spend some time together; Haley throws a party without permission; Cameron's father visits.

Phil buys a car without consulting Claire; Jay is on a mission to get to his high-school reunion with Gloria and Manny; Lily loses her favorite toy on a train.

When the family travels to Disneyland, Phil struggles to keep up with Luke; Claire is stunned when they run into Dylan; Cam and Mitch must curb Lily's new penchant for running.

Urkel hiccups after thieves rob him; Laura finds romance.

Urkel tags along on Carl's camping trip; Harriette seeks a job.

Steve's awkward Aunt Oona visits and chaos erupts when she holds a singing contest.

Gloria and Jay bicker while trying to order lunch at a diner; Claire and Cam have different theories on how to discipline kids; Luke accepts an award under false pretenses.

While Gloria helps Cam and Mitch pursue an adoption opportunity, Jay and Manny baby-sit Lily; Alex attends her first prom; Haley makes a shocking announcement about her plans for the 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's truck and hits the road with her friend Paige.

A hernia-bearing Joey tries to pick up a quick acting gig; Rachel discovers that Ross never had their marriage annulled.

Rachel wants Ross to admit that he's mentally unbalanced so that a judge will grant them an annulment.

While Monica helps Rachel move out, the two women have a war of words; Chandler says a.

Rachel regrets asking Phoebe to jog with her when her uncoordinated movements attract unwanted attention.

After bleaching his teeth, Ross discovers they glow in the dark; Joey's new roommate wants to redecorate.

Chandler finds out Monica never told her parents he was living with her; Rachel tries her hand at making dessert.

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

Janine's attitude causes strife between Joey and his friends; Rachel gets an apothecary table from a flea market.

Ross and Chandler argue over authorship of a joke; a question from Monica puts Phoebe on the spot; Joey reluctantly takes a job at Central Perk.

Rachel is worried about her sister's flirtation with Ross; sickly Monica is well enough to seduce Chandler; Joey uses free food to lure women to date him.

Rachel and her sister get into a heated sibling rivalry over Ross; Chandler confesses he hasn't cried since he was a child.

When Rachel tells her friends about Barry and Mindy's impending divorce, the others speculate how their lives could have turned out if they had chosen different paths.

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.

Friends and former teammates (Adam Sandler, Kevin James, Chris Rock) learn that age does not, necessarily, equal maturity when they reunite to honor the memory of their basketball coach.

Lenny Feder (Adam Sandler) moves his family back to his hometown to be with his old friends and finds out that he didn't leave the crazy life behind in Los Angeles.

Phil takes Jay on an unconventional fishing trip; Gloria wonders how to break the news about her pregnancy; Dylan temporarily moves in with the Dunphys; Cam and Mitch think about adopting a cat.

Phil gets a vasectomy; Gloria and Jay can't agree on whether or not they should find out the sex of the baby; Mitchell tries to steer Cameron toward getting a part-time job.

Claire and Phil embarrass Haley when they drop her off at college; Manny makes Gloria and Jay take a class; Lily gets into a tussle on her first day of kindergarten.

Phil can't accept that Luke wants to quit magic; Gloria's snoring keeps Jay and Manny awake; Mitch and Cam struggle to deal with their reversed role.

Claire must rein in her enthusiasm for Halloween and keep her celebration kid-friendly; Phil decides to hold an open house on Halloween; Mitch and Cam have a costume party; Gloria's hormones make her more quick-tempered than usual.

Jay and Gloria host a yard sale to help with a school fundraiser; Mitch and Cam vet Alex's new friend; Manny finds a trunk full of secrets.

Cameron watches Alex and Luke while Phil, Claire and Mitchell deal with Haley's arrest; Jay tries to cut short a surprise visit from ex-wife Dede (Shelley Long), so she doesn't learn about Gloria's pregnancy.

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.

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.

When Rachel tells her friends about Barry and Mindy's impending divorce, the others speculate how their lives could have turned out if they had chosen different paths.

Chandler's anniversary gift to Monica is really one an ex-girlfriend gave him; Joey hires a look-alike; Ross tries to teach martial arts to Rachel.

Ross toys with dating one of his students; a curling iron starts a fire in Phoebe and Rachel's apartment.

Monica and Phoebe compete to find Rachel a date; Joey tries to con his friends into buying him a new refrigerator.

Chandler jeopardizes Joey's chances for the lead role in a TV series when he forgets to take down a message.

Ross recruits some friends to go with him on his first meeting with Elizabeth's father (Bruce Willis); Phoebe makes Chandler and Monica paranoid by chronicling their every move.

Elizabeth's father (Bruce Willis) threatens to get Ross fired if he does not stop dating his daughter.

Chandler asks Phoebe to help him choose a special ring; Rachel urges Paul (Bruce Willis) to express his feelings.

Monica and Chandler encounter Richard (Tom Selleck), Monica's former boyfriend, in a romantic restaurant.

Monica and Chandler encounter Richard (Tom Selleck), Monica's former boyfriend, in a romantic restaurant.

Monica feels that Rachel is trying to steal the spotlight from her engagement; Chandler worries about his performance in the bedroom.

Monica learns what her parents have done with her wedding fund; Joey teases Rachel about her late-night reading material.

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.

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.

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

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.

The Griswolds (Chevy Chase, Beverly D'Angelo) spend the holiday in a garish way, especially when a country cousin (Randy Quaid) pulls up in an RV.

Adopted as a baby by one of Santa's elves (Bob Newhart), a man (Will Ferrell) leaves the workshop to search for his family in New York.

The yuletide season brings headaches for Santa Claus (Paul Giamatti), who bails his ne'er-do-well brother Fred (Vince Vaughn) out of trouble and puts him to work in his factory.

A football coach (Gene Hackman) and his team's owner recruit a ragtag band of has-beens and wannabes after failed negotiations lead to a strike.

When Claire, Manny and Luke go to Alex's academic decathlon for the weekend, Phil throws a guys' night at home; Manny and Luke crash bar mitzvahs looking for a girl; Cam and Mitchell get Jay and Gloria a surprise baby gift.

Mitch and Cam try to save an old tree in the park; Jay takes Manny to a kid's Olympics-themed birthday party; Gloria and Claire have an eventful shopping trip.

When Manny and Luke's Little League team makes it to the playoffs, Claire and Cameron search for a field to use; Gloria uses a microphone to sing to the baby.

Chandler's efforts to bond with Monica's father (Elliott Gould) backfire during a racquetball game; Rachel tries to teach Joey how to sail; Monica tries to replicate Phoebe's grandmother's cookie recipe.

Rachel considers hiring an inexperienced but handsome man over a better qualified woman as her executive assistant.

Rachel makes her handsome new assistant (Eddie Cahill) hang out with Joey rather than the women in her office.

Monica makes Chandler apologize to an old girlfriend (Stacy Galina) for leaving her because she was fat; Monica struggles to select a maid of honor.

Ross' doctoral dissertation is stored in a remote corner of the university library frequently used by students having sex; Rachel and Phoebe bond with Joey's date (Kristin Davis), then try to convince him to continue seeing her.

Joey may have ruined Rachel's chances with Tag (Eddie Cahill) when he opens his mouth during Thanksgiving dinner.

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.

Phoebe and Joey are at odds when she tries to cancel their weekly dinner plans so she can meet an old beau.

During their first night together, Rachel and Tag realize they forgot to ship out an important package at the office.

On her first day as a telemarketer, Phoebe encounters a distraught man (Jason Alexander) who is determined to end his life.

A poor boy (Peter Ostrum) and his grandfather (Jack Albertson) win a tour through the marvelous factory of a wily confectioner (Gene Wilder).

The yuletide season brings headaches for Santa Claus (Paul Giamatti), who bails his ne'er-do-well brother Fred (Vince Vaughn) out of trouble and puts him to work in his factory.

Feeling sad and unwanted, Santa takes the day off before Christmas; voices: Mickey Rooney, Shirley Booth; animated.

Boris Karloff narrates an animated tale about the lonely and heartless title character who decides to dress up as Santa and steal the Christmas decorations, gifts and feast from the people of Whoville.

The Griswolds (Chevy Chase, Beverly D'Angelo) spend the holiday in a garish way, especially when a country cousin (Randy Quaid) pulls up in an RV.

Adopted as a baby by one of Santa's elves (Bob Newhart), a man (Will Ferrell) leaves the workshop to search for his family in New York.

A poor boy (Peter Ostrum) and his grandfather (Jack Albertson) win a tour through the marvelous factory of a wily confectioner (Gene Wilder).

A poor boy (Freddie Highmore) and four spoiled children win a tour through the incredible factory of an odd confectioner (Johnny Depp).

Coastal Oregon kids (Sean Astin, Josh Brolin, Jeff Cohen) follow the treasure map of pirate One-Eyed Willie past his deadly traps to gold.

Mitch and Cam's friend Sal announces she's getting married the next day and they are in the wedding; Gloria doesn't trust her new nanny; Claire bonds with Haley; Phil helps Luke with a girl.

Claire and Cam bring in a third party (Wendi McLendon-Covey) when they reach an impasse on a landscaping decision; Phil teaches basic fix-it skills to the kids; Mitch helps Lily with a bully.

While at the hospital, Claire and Phil see an older version of their family; Manny and Jay visit a private school; Mitch and Cam organize a day for Gloria and Lily.

Phil gets desperate when Cam and Claire's flipped house is more difficult to sell than expected; Javier brings his new girlfriend along to visit Manny.

Phil is excited to discuss his job with Luke, Manny and their classmates on career day, but things get ugly when Phil's nemesis shows up; Cam and Mitch make a mistake while executing tooth fairy duties.

Mitch's ex-boyfriend, a personable and successful doctor, invites the whole family to a fundraising event at a roller rink; Phil teaches Gloria how to skate; Haley helps Alex talk to boys.

Phil gets a new RV for a fun family road trip; Jay and Gloria search for Manny's backpack; Lily's gymnastics meet brings out Cam and Mitch's competitive spirit.

Celebrating Rachel's 30th birthday inspires the friends to reminisce about their own 30th birthdays -- Joey got angry with God for breaking their deal; Ross bought a sports car; Monica got drunk and embarrassed herself at her surprise party.

Joey accidentally informs a cast member (Susan Sarandon) that she will be fired so that his character will get her character's brain.

Monica and Chandler fondly reminisce about London until a startling revelation leaves Chandler floored.

Monica regrets telling a woman about a discount bridal shop when they end up competing for a wedding dress.

Joey is overjoyed to be nominated for a.

A groom's (Andy Samberg) world comes crashing down when his estranged father (Adam Sandler) -- who is desperate to reconnect with his son -- shows up on the eve of the young man's wedding.

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.

A bumbling relative gets the chance to redeem himself when he's called upon to look after his brother's three children.

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.

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.

A bumbling relative gets the chance to redeem himself when he's called upon to look after his brother's three children.

A groom's (Andy Samberg) world comes crashing down when his estranged father (Adam Sandler) -- who is desperate to reconnect with his son -- shows up on the eve of the young man's wedding.

Steve ends up in a nunnery when he discovers Myra has entered a convent.

Laura asks Steve to take more ooze juice to turn himself into the irresistible Stefan Urquelle.

Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his mother, Sheldon tries to make his first friend by following techniques in a self-help book.

George Sr. is rushed to the emergency room; Meemaw comes to baby-sit; the kids have an adventure getting to the hospital on their own.

After choking on a breakfast sausage, Sheldon refuses to eat solid foods; he discovers comic books for the first time.

Sheldon struggles with newfound popularity after utilizing statistics to help the football team.

Sheldon goes on a mission to disprove a NASA representative who dismisses his science.

Monica is so perturbed by Chandler's instant attraction to her gorgeous visiting cousin (Denise Richards) that she persuades Ross to let her stay at his apartment; Ross finds his attraction to his cousin unsettling.

Rachel encounters a sorority sister (Winona Ryder) with whom she shared an embarrassing and passionate moment.

While writing their wedding vows, Monica and Chandler have trouble putting their true feelings on paper.

Trying to ensure an ideal wedding, Monica arranges a meeting so Chandler and his estranged father can reconcile.

On the eve of the wedding, Ross searches for missing Chandler, who has doubts, while the girls distract unsuspecting Monica.

On the eve of the wedding, Ross searches for missing Chandler, who has doubts, while the girls distract unsuspecting Monica.

The reception following Monica and Chandler's wedding is almost upstaged by the news that a member of the group might be pregnant.

The gals speculate about the father of Rachel's baby, the guys scramble after Chandler loses the film from his wedding.

The real father of Rachel's baby is revealed; Monica and Chandler struggle to make their honeymoon flight.

Ross and Rachel argue over how they ended up in bed together weeks earlier, so Ross announces he has the encounter on tape.

Ross is horrified when Rachel goes on a date with a soap-opera star (Johnny Messner); Phoebe is attracted to a clumsy chef whom Monica wants to fire.

At Monica's Halloween party, Phoebe meets her twin sister's fiance and finds that she is attracted to him.

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.

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.

It's the grand reopening of the old Langley Falls boardwalk, and no one's more pumped than the Smiths.

Stan invites his half-brother, Rusty (Lou Diamond Phillips), over for Thanksgiving, then gets upset when he learns how wealthy Rusty is.

Francine invites her adoptive parents to Thanksgiving dinner, ruining Stan's plans to watch football.

Overlooked for promotion for 20 years, Stan decides to woo the senator who supervises the CIA task force; Stan makes Steve go to the same private academy.

Klaus and Roger try, unsuccessfully, to elevate Steve to a higher social circle; Stan and Francine prank each other.

Steve and Roger try to cheer up Snot after he is rejected by Hayley; Stan wants to live like a man from the 1960s.

Stan and Francine's fight over how to redecorate the house escalates into them splitting the house down the middle.

Francine starts working at Stan's office, which cramps his style and inhibits his ability to flirt with co-workers.

Steve slips into the gorilla exhibit while at the zoo with Stan; Roger sets out to write a song that will catapult him to fame as a country singer.

Stan buys a new hot tub for stress relief from family life, but it begins encouraging him to misbehave.

Pastor's kids, country boys and fashion models battle it out for $25,000 and Wipeout immortality.

Bowlers, carnival workers, and flag footballers armed with Gronk's advice, battle for $25,000 and for the carnival crew, a chance to conquer the best obstacle course on Earth.

Steve tags along on Laura's cheerleading trip to Omaha, Neb.; Harriette and Carl look forward to a weekend alone.

The sophisticated Stefan Urquelle, alter ego of Steve Urkel, returns.