Fortysomething, straight-laced Cal Weaver is living the dream - good job, nice house, great kids and marriage to his high school sweetheart. When Cal learns that his wife has cheated on him and wants a divorce, his "perfect" life unravels.

It seems everyone has a bone to pick: Jay and Gloria get on each other's nerves while ordering lunch; Phil has to fire Mitchell; Cam and Claire disagree on how to discipline children; and Manny is upset that Luke accepted an award under false pretenses.

It's been an emotional roller coaster for Mitch and Cam in their quest to adopt another child, and now they need Gloria's help as a translator. Meanwhile, Claire and Phil send Alex off to her first prom, and Haley has shocking news of her future plans.

Jay makes it known that he wants to keep his birthday low-key. But leave it to the family to miss the mark yet again! Phil takes Jay on a very unconventional fishing trip with his buddies, and Gloria struggles with how to break the pregnancy news to him.

Phil and Claire plan to enjoy life once Luke leaves for college, so Phil goes in for a vasectomy. Meanwhile, Jay and Gloria disagree about whether or not to find out the sex of the baby, and Gloria is in denial about needing maternity clothes.

The day has arrived for Phil and Claire to drop Haley off at college. Meanwhile, Manny forces Jay and Gloria to take a baby class, and Mitch and Cam drop Lily off for the first day of kindergarten, where she gets into a tussle with a little boy.

Phil makes a spontaneous purchase for a new car without Claire. Will he have buyer's remorse? Meanwhile, Jay is determined to get to his high school reunion with Gloria and Manny in tow, and Lily loses her favorite stuffed animal on a public metro train.

Nothing says good ol' family fun like a trip to Disneyland! Phil tries to keep up with Luke, Claire's shocked when they run into Dylan, Jay and Gloria disagree about what shoes to wear, and Mitch and Cam must contain Lily's new affinity for running.

Rachel debates whether she should break the news to her baby's father.

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

Ross reveals that he videotaped a sexual encounter between Rachel and him.

Fortysomething, straight-laced Cal Weaver is living the dream - good job, nice house, great kids and marriage to his high school sweetheart. When Cal learns that his wife has cheated on him and wants a divorce, his "perfect" life unravels.

For centuries, golf has been a gentleman's game. A game of tradition, etiquette and, above all, sportsmanship ... until now.

For centuries, golf has been a gentleman's game. A game of tradition, etiquette and, above all, sportsmanship ... until now.

Ross is horrified when Rachel goes on a date with a soap-opera star. 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.

Rachel wants to find her own apartment. Phoebe is ecstatic when Eric dumps Ursula to date her.

Rachel tells her belligerent father that she is pregnant with Ross' child.

Monica encounters a high-school friend and invites him to Thanksgiving Day dinner.

A Denver man tracks down the Florida woman who stole his identity, financed a luxurious lifestyle, and destroyed his credit.

When her husband suddenly dumps her, longtime dedicated housewife Deanna turns regret into re-set by going back to college ... landing in the same class and school as her daughter, who's not entirely sold on the idea.

A Denver man tracks down the Florida woman who stole his identity, financed a luxurious lifestyle, and destroyed his credit.

Sheldon refuses to ride in a car after getting into an accident with Meemaw. Meanwhile, Meemaw is forced to take the church shuttle while her car is in the shop.

When the IRS accuses Sheldon of making a mistake, he stops at nothing to prove them wrong. Then, when Dale is forced to get a colonoscopy, he tries to convince Meemaw to join him.

Sheldon faces extreme consequences after installing a pirated computer game. Meanwhile, Mary and Meemaw take Brenda out for Girls Night, while George watches Billy.

Sheldon finds himself at odds with Paige once again when she considers enrolling at East Texas Tech. Meanwhile, Mary seeks the advice of June when looking for a change.

The Coopers discuss the possibilities of black holes and alternate universes when Dr. Sturgis comes over for dinner.

In the fourth season finale, Missy's first heartbreak triggers a series of events that lead the Cooper family to the brink.

Chandler is angry when Monica buys expensive boots. Phoebe tries to get tickets to a Sting concert.

Ross' new girlfriend orders Christmas cards with a photo of them on the cover.

Rachel joins Joey for a night out in order to prepare him for a big date.

Monica blabs her suspicions when she mistakenly believes Joey is infatuated with Phoebe.

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

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

Joey tells Rachel that he is in love with her.

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

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

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

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

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

Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie. Meanwhile, Sheldon frets over a change to his hamburger routine.

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard, and Penny's intervention only exacerbates the situation.

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated for its own good.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled and impossible to be around after meeting Dennis, a 15-year-old physicist who's smarter than he, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's "The Time Machine" causes Penny to miss work, she scolds Leonard about his sci-fi collectibles. He decides it's time to give up such childish pursuits.

The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.

A CIA agent will do anything to protect his homeland and family.

In the fifth season premiere episode, Sheldon and Missy both run away from home, while Mary gets some upsetting news about her husband, George.

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

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

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

While Mary's away, George finds himself giving advice on Missy's love life. And Georgie has a solution for Meemaw's business woes.

Missy asks some uncomfortable questions about sex in church.

Overdue Rachel tries everything to rush the delivery of her baby.

The friends cause havoc in the maternity ward as Rachel begins childbirth.

The friends cause havoc in the maternity ward as Rachel begins childbirth.

Joey finds himself engaged to Rachel soon after she delivers her baby girl, while Phoebe assumes Ross is the one who proposed.

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

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

Monica fears Chandler has a sexual fetish involving sharks.

Famished Phoebe waits for tardy friends to arrive at her birthday dinner.

Ross ridicules Rachel's choice of a male nanny.

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

Rachel has a bone to pick with her self-centered sister on Thanksgiving.

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

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to a reluctant Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Hosted by John Cena and Nicole Byer with Camille Kostek as field host, the all-new series takes viewers on a white-knuckle ride, featuring new course elements that will push contestants' to even greater extremes to win the grand cash prize.

Hosted by John Cena and Nicole Byer with Camille Kostek as field host, the all-new series takes viewers on a white-knuckle ride, featuring new course elements that will push contestants' to even greater extremes to win the grand cash prize.

Luke wants to quit magic, but Phil can't seem to accept it. Meanwhile, Gloria's snoring is keeping the whole house awake, forcing Jay to take desperate measures; and Mitch and Cam's household dynamic is put to the test when they decide to swap duties.

Claire has overdone it in Halloweens past, so this year she's being forced to tone it down, and Phil has an idea to hold an open house on Halloween. Meanwhile, Mitch and Cam host a costume party while contending with Lily wondering who her real mom is.

Jay and Gloria hold a yard sale to help Manny and Luke with their school's charity fundraiser, and the entire family pitches in. Mitch and Cam help Claire assess Alex's new 'boy friend,' and Manny finds an old trunk that hides a secret.

Phil and Claire get a call that Haley has been arrested for underage drinking, so they bring Mitchell, the family lawyer, to the police station. Cameron stays back to watch Alex and Luke. Meanwhile, Jay has to deal with a surprise visit from Dede.

When Claire takes Manny and Luke to Alex's academic decathlon, Phil throws a boys' night at the house. Meanwhile, Alex is under intense pressure, Manny and Luke bar mitzvah hop to find a cute girl, and Cam and Mitch arrange for a gift for Jay and Gloria.

Mitch joins Cam's efforts to save an old tree in the park, but just how far will they go? Jay and Manny are each pushed beyond their comfort zones when they attend a kid's Olympics-themed birthday party, and Claire brings Gloria along on a Costco run.

Manny and Luke's team makes it to the playoffs, so Claire and Cameron scramble for a location and decide to do a makeover on a rundown field. Inspired, Claire and Cam want to try flipping a house, and Phil and Mitchell fight over who will tell them no.

Jay's planned for the whole family to celebrate New Year's at a hotel in Palm Springs. However, when the hotel disappoints, everyone starts to do their own thing, leaving Jay dejected -- that is, until he runs into the one and only Billy Dee Williams!

With the baby on the way, Jay and Gloria throw Manny a surprise party for his 14th birthday. Meanwhile, Phil and Claire deal with a new, older guy that Haley has started hanging out with, and Cam becomes jealous of the bond Lily seems to have with Mitch.

Gloria's mom and sister have made the trip from Colombia, and they come bearing baby names and a whole lot of family baggage. Meanwhile, no one has confidence that Phil will be able to help with the kids' problems, and Lily has picked up some bad habits.

Thespians, hockey players and first responders face off against the epic Wipeout course for a shot at the $25,000 grand prize!

The Suicide Squad takes over Wipeout this week with special guests and another set of teams battling it out for $25,000!

Sheldon takes his first engineering class with Professor Boucher. Also, Meemaw and Dale help take care of his ex-wife, June.

While Sheldon battles the mysterious Grand Chancellor of the university over science requirements, Mary discovers that Georgie is working at Meemaw's illegal gambling room.

While George Sr. plays handyman at Brenda Sparks' house, Sheldon gets the science yips and has to learn how not to think.

Sheldon gets a dorm room all to himself, which soon becomes the campus hotspot. Meanwhile, Meemaw gets an unwanted business partner.

Sheldon acts as Mary's spy when he's forced to spend the night at church for a youth lock-in. Meanwhile, Georgie finds himself attracted to an older woman.

Sheldon attends his first comic book convention, and Mary tries selling make-up.

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

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

Monica invites Rachel's workplace rival to her birthday party. Joey flirts with Emma's new nanny, and Phoebe and Mike 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.

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

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

Ross and Chandler trade barbed insults on their alma mater's Web site.

The gang buys scads of lottery tickets for the multimillion-dollar jackpot.

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 to a rooftop Days of Our Lives party being thrown by Joey.

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

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes off faster than he'd like. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

Cameron is putting on the school production of "Phantom of the Opera," but when their star falls ill, Manny pulls out all the stops to land the lead. Meanwhile, Jay and Phil wind up in a golf-off with Pepper and Mitch, and Gloria takes Alex to a psychic.

A fun Valentine's Day romp between Phil and Claire's alter egos lands Claire in the hospital. Meanwhile, Gloria and Jay's attempts to be romantic keep getting interrupted by the kids, and Cam and Mitch host a wild Valentine's Day Lonely Hearts Party.

Claire flies solo to her college reunion and runs into a professor she once dated, but things get awkward when Phil shows up. Back at home, Jay is obsessed with winning a bowling tournament, and Gloria is running ragged with the baby but won't admit it.

Mitch and Cam's best gal pal, Sal, makes a surprise drop-in with big news -- she's getting married... tomorrow! Cam and Mitch are the best men, but they can't help but question whether this party girl can settle down, and they consider an intervention.

Claire and Cam are entrenched in the house flip, but when they can't agree on landscaping, a "neutral" third party is brought in -- Pam, the lesbian mom from Lily's school. Meanwhile, Phil decides to teach the kids basic fix-it skills around the house.

When Phil takes Claire for her angiogram, they encounter a family that looks like their future selves, and they're not sure they like what they see. Manny takes Jay to visit a private school, and Mitch and Cam organize a "girls day" for Gloria and Lily.

Phil is confident he can sell Claire and Cam's flipped house, but when it proves to be harder than he thought, he recruits the family into taking some desperate measures. Meanwhile, Javier is visiting Manny and brings along his new girlfriend.

Phil is jazzed to share the wonders of residential real estate with Luke and Manny's classmates for career day, but then Phil's nemesis Gil Thorpe shows up. Meanwhile, Gloria challenges Jay's claims of always wanting to become a novelist.

Mitch's ex-boyfriend invites the family to a fundraiser at a roller rink, and they all run circles around each other as Cam tries to play it cool, Claire avoids talking to Jay about inheriting his closet business, and Phil teaches Gloria how to skate.

Phil gets a new RV with hopes of going on a family road trip, and Claire decides to let him learn the hard way why this will likely be a terrible idea. Meanwhile, Manny has misplaced his backpack and Jay and Gloria go with him on a hunt for it.

Everyone flies down to Florida to be with Phil after his mom's passing. Claire helps Phil with Gracie's last wish for Frank, and the kids reflect on the gifts grandma left for them.

Mitch and Cam decide to get married. The kids are driving Phil and Claire crazy. They realize with some rescheduling, they can get all the kids out of the house and have a week to themselves. Jay and Gloria are preparing for Manny's solo trip to Colombia.

Sheldon makes friends with his dorm neighbors. Meanwhile, George Sr. learns his job is in jeopardy.

When a new scientist joins the lab, Sheldon is the odd man out. Meanwhile, Mary is given a lotto ticket.

Sheldon joins Dr. Linkletter and Dr. Sturgis on a science road trip, which lands them in the middle of nowhere. Meanwhile, Georgie continues to lie about his age.

When Meemaw's gambling room is a success, she finds herself with a suitcase of illegal cash. Meanwhile, Missy starts a business and Sheldon dips his toe in the stock market.

In the 100th episode, Sheldon gets an odd request from an old friend, while George and Mary are caught in the middle of Meemaw and Dale's breakup, and Georgie comes clean to Mandy.

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

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 prepares to propose to Phoebe, but ex-boyfriend Mike is not yet out of the picture.

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

Ross drinks too much alcohol at dinner with Rachel, Joey and Charlie. Frank Jr. 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, and Ross emerges from a tanning booth with a two-toned appearance.

An X-rated cake is delivered to Emma's first birthday party.

Rachel convinces her sister to baby-sit over Ross' protests, and Joey writes a letter to an adoption agency on Monica and Chandler's behalf.

When Ross interviews with Charlie's ex-boyfriend for a prized grant, the doctor makes a shocking stipulation.

Monica and Chandler fuss over their apartment as they expect a visit from the adoption worker. 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 labors under a misconception about Monica and Chandler's respective occupations.

Rachel and Phoebe spot Chandler getting into a vehicle with a mysterious blond woman.

The gang is thrilled when they see Terminator: The Sarah Connor Chronicles' Summer Glau is also aboard their train to San Francisco for a scientific symposium. Sheldon frets over having forgotten a paper he wants to present to George Smoot.

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up with Leslie. Sheldon, home alone and looking forward to it, locks himself out and has only one other place to stay: Penny's.

Leonard is torn between being honest or self-serving when Stuart asks his advice for an upcoming second date with Penny. Wolowitz realizes there's a crucial error in a toilet he designed for the International Space Station.

The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behavior leaves Leonard unsure if he should go.

Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behavior modification experiment on Penny.

Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Meanwhile, Howard becomes a third wheel to Leonard and Penny.

Sheldon looks forward to squaring off against an actor from the Star Trek universe he holds enmity towards in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard to get Penny to set him up with a friend of hers.

Leonard, hoping to fit in with Penny's football-loving friends, gets tutored in the sport by Sheldon. Raj is infuriated when Wolowitz's skirt-chasing leads to the loss of his prized patang.

Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that's left him with an inability to be around loud verbal conflicts.

With the rest of the gang off on a desert camping trip to view the Leonid meteor shower, Sheldon must play hero after Penny slips in the tub and dislocates her shoulder.

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

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

With the Coopers facing judgement from the congregation in the wake of Georgie's pregnancy, Sheldon is distracted by the family drama, while Missy stands up for her brother.

Sheldon struggles with the first signs of puberty while his parents both hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

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

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 sights but also 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, and 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 say goodbye and embark on the next chapters of their lives.

The six friends say goodbye and embark on the next chapters of their lives.

After Rachel leaves her fiance at the altar, she moves in with Monica and finds that independence is not so easy, particularly without Daddy's credit cards.

Ross is stunned to learn his ex-wife is pregnant with their child. Monica's dinner for her overly critical parents is a disaster.

The group loves Monica's new boyfriend. Chandler resumes smoking, and Phoebe receives a large sum of money unexpectedly.

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. Rachel receives her first paycheck.

Barry Kripke pranks Sheldon during his spot on NPR, leaving him with a taste for vengeance. Wolowitz, pressured by Bernadette to define their relationship, gets advice from a fantasy version of Katee Sackhoff.

Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny.

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university party.

A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

Stuck on the solution to a physics problem, Sheldon seeks a number of alternative approaches to change his thinking and free the mental block -- including working with Penny at The Cheesecake Factory.

When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

Deadshot, Harley Quinn, Captain Boomerang, Killer Croc and other armed super-villains unite to battle a mysterious and powerful entity, while the diabolical Joker launches an evil agenda of his own.

Deadshot, Harley Quinn, Captain Boomerang, Killer Croc and other armed super-villains unite to battle a mysterious and powerful entity, while the diabolical Joker launches an evil agenda of his own.

Claire arrives for her first day at Jays' company and worries that Jay doesn't have a real job for her. Cam, having lost his music teacher job due to budget cuts, is now substitute teaching. Meanwhile, Luke and Manny have their first day of high school.

Phil seems to have found his wheelhouse in real estate, but it's taking up a lot of his time. Meanwhile, Luke invites his buddies over for high-stakes poker; Gloria think baby Joe might be cursed; and Cam holds a pet funeral for Larry the cat's wife.

Cameron's sister Pam is coming for a visit, and Cam is in a panic to hide the engagement, but it turns out she has news of her own. Phil and Claire decide to miss one of Luke's soccer games. Gloria is in denial that she might need reading glasses.

Jay managed to get reservations for an adult's night out. Unfortunately, everyone's running late -- Gloria is taking forever to get ready, Claire and Phil can't agree about leaving Luke home alone, and Mitch and Cam end up putting on the same outfit.

When Gloria hires a male nanny, Jay and Manny are pretty much dead set against it. Frank is in town and feeling lonely, so Phil and Jay take him out to help get his groove back. Meanwhile, Mitch and Cam commission Pepper to plan their dream wedding.

The family attends the annual school fair, and Phil has a big 20th wedding anniversary surprise planned for Claire at the fairgrounds, but unfortunately, she simultaneously has a surprise for him back at home.

With some urging from Claire, Jay begrudgingly agrees to return to ClosetCon this year, where he is reunited with some old colleagues. Cam takes Mitch and Lily to the Tucker family farm for the first time and is excited to fold them into country life.

A citywide power outage leaves Chandler stranded in the vestibule for an automatic banking machine with gorgeous model Jill Connick. Ross tries to ask Rachel out on a date. Joey learns Monica used to be infatuated with him.

When Ross and Monica's grandmother dies, the whole gang attends the funeral service. Chandler questions his sexual persona when a co-worker wants to arrange a date for him with another guy.

Monica intends to host a cozy Thanksgiving feast in her apartment with her friends but her plans go awry, and the feast becomes a fiasco.

The friends promise to celebrate New Year's Eve without dates but soon all their plans change. Ross gets a pet monkey.

Rick and Fred are best friends who have each been married for many years. When they show signs of restlessness, their wives take a bold approach to revitalizing their marriages by granting them one week of freedom to do whatever they want.

Three long-suffering office professionals concoct a hairbrained plot to murder their maniacal bosses in this raucous comedy.

Chandler's flamboyant mother comes to New York for a visit. Phoebe and Monica cause a traffic accident.

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 from Monica.

Chandler sees Rachel nude. Joey learns his father is having an affair.

On Valentine's Day, Ross meets his ex-wife while on his first date in nine years. The girls rebel by burning mementos of past relationships.

Phoebe's twin sister causes confusion and conflict. Ross attends childbirth classes with his ex-wife and her girlfriend.

Rachel and Monica squabble over two handsome doctors. Ross ponders his impending fatherhood with his own father.

The Grinch is irritated at the thought of the nearby village having a happy time celebrating Christmas. So, disguised as Santa Claus -- with his dog Max made to look like a reindeer -- he raids the village to steal all the Christmas things.

The Grinch is irritated at the thought of the nearby village having a happy time celebrating Christmas. So, disguised as Santa Claus -- with his dog Max made to look like a reindeer -- he raids the village to steal all the Christmas things.

A restaurant owner interviews Monica for a chef's position. Ross asks Joey how to talk dirty to women.

The women lose money in a poker game with the men. After getting advice from a champion card player, they demand a rematch.

Rachel accidentally lets Ross' pet monkey escape, and the friends form a search party. Rachel learns that her former best friend is engaged to marry Rachel's former fianc?.

Rachel reunites with her duplicitous ex-fiance. Chandler agonizes about a woman who doesn't call him after the first date.

Monica meets a woman who helps her live out her fantasies. Ross' pet monkey becomes sexually mature and makes everyone crazy.

Monica finds out more than she wants to know about her latest love. Chandler's friends at work treat him differently since his promotion. Ross' ex-wife begins giving birth.

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

Rachel finds out about Ross' secret love for her but another surprise awaits her.

Rachel gets an unpleasant surprise when Ross returns home. Phoebe has varied success cutting the friends' hair.

Phoebe unwittingly disgusts everybody. Joey competes with a fellow salesman.

The downstairs neighbor dies and bequeaths his strange possessions to Monica and Rachel.

Everyone is surprised when Phoebe's husband shows up.

Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university party.

A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

Stuck on the solution to a physics problem, Sheldon seeks a number of alternative approaches to change his thinking and free the mental block -- including working with Penny at The Cheesecake Factory.

When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him get ready for the big night.

Sheldon gets to square off at the bowling alley against nemesis Wil Wheaton. Meanwhile, Leonard's miffed when Penny doesn't respond the way he hoped after saying "I love you."

Subsequent to Leonard and Penny's break-up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting for her the story of how he met and moved in with Sheldon.

Howard and Raj try to find the perfect match for Sheldon by setting him up on an Internet dating site. Seeing her new boyfriend interact with the gang makes it clear to Penny that she can't go back to dating dumb jocks after dating Leonard.

A CIA agent will do anything to protect his homeland and family.

The friends want to give Ross a birthday party but disagree about money. Monica gets promoted and learns a tough lesson.

Joey and Chandler try to attract women with baby Ben. Phoebe gets terminated from her singing job and replaced by a professional, Stephanie.

Dramatic developments occur in Ross and Rachel's relationship. Chandler regrets asking Monica to help him lose weight.

Rachel makes a painful discovery concerning Ross. Monica's new boss gives her an impossible task.

Phoebe learns the surprising truth about her father. Ross makes Monica's Christmas party guests miserable.

Joey gets a great acting opportunity. Rachel dates a guy who is amazingly similar to Ross.

Carol and Susan prepare for their wedding with some help from an uncomfortable Ross.

Ross searches for his former pet monkey. Joey dates an obsessed fan.

Ross spends some quality time with Marcel, his former pet monkey. Chandler gets a big surprise from a sexy former classmate.

Monica's old home video shows Ross' true feelings for Rachel. Joey gives a gaudy gift to Chandler.

Ross and Rachel encounter obstacles to romance. Monica becomes enamored with a handsome, older doctor.

Monica's parents find out about her middle-aged boyfriend. Chandler and Joey argue and it could mean the end of their living arrangement.

Barry Kripke pranks Sheldon during his spot on NPR, leaving him with a taste for vengeance. Wolowitz, pressured by Bernadette to define their relationship, gets advice from a fantasy version of Katee Sackhoff.

Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, his first date ever, and Penny finds herself accompanying them.

Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a binge of healthy living and ultra-safety.

Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

Sheldon meets Amy Farrah Fowler's mother and comes to the realization he no longer wants to see Amy, and Leonard realizes everyone is in a relationship except for him.

When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The rest of the gang is interviewed by the FBI for Wolowitz's security clearance with Sheldon accidentally letting slip some damaging information.

Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

Phil is upset he lost his elected office to Gil Thorpe, and when he finds out Luke is facing Gil's kid in wrestling, things get personal. Mitch and Cam ask Claire to pick up Lily from school but neglect to mention that her class just had a lice scare.

Cameron is in charge of the school's spring dance, but when a popular teacher returns from sabbatical, a not-so-friendly competition blooms. And with Claire on chaperone duty, Phil gets Haley to accompany him to his annual realtor's banquet.

Jay's determined to teach Luke about tools and impart some manly wisdom, and Claire, Gloria and Lily go shopping for Lily's flower girl dress. Meanwhile, Mitch, Cam, Alex and Manny go for a day at the museum, and Phil helps Andy with his anniversary gift.

The adults are Vegas-bound when Jay's client gets them nice hotel accommodations, but Jay soon becomes obsessed with upgrading. Meanwhile, Claire hits the tables, Phil auditions for a secret society of magicians, and Cam ducks out of a spa day with Mitch.

Mitch struggles to hide his feelings about the unflattering wedding topper Cam's dad whittled for them, Phil tries to help Gloria sell her pre-Jay apartment, and Claire and the kids go to Jay's to help him prep for the night with the family he's hosting.

The entire family tags along as Phil fulfills his mom's wish for him to return to his roots and visit the country where he was conceived -- Australia. Unfortunately, Phil's attempts to embrace his native land are met by a lot of rejection.

Phil fails at his one task to stay home and wait for the repairman, forcing him to tell an elaborate lie to Claire. Meanwhile, Gloria is obsessing over a family portrait, and Claire accuses Cam of being too snobby to use her girls' hand-me-downs.

Jay, Gloria and Manny challenge each other to step outside their comfort zone. Mitch and Cam's wedding is getting too big and costly, so they resort to selling a couple of their prized possessions. Meanwhile, the kids play a joke on Phil and Claire.

Mitch and Cam's big day is finally here and nothing can ruin it -- until nothing turns into a whole lot of somethings. Meanwhile, Jay and Gloria host the Tuckers, Phil squeezes in an eye procedure, and Claire embraces her role as "best woman."

The wedding day chaos continues as guests start to get testy, Mitchell and Cameron are feeling discouraged, and poor Claire starts showing physical wear and tear. But an unexpected turn of events leads to the ceremony we've all been waiting for.

Wipeout is back and bigger than ever! Flamenco dancers, pro tennis players and musical sweethearts take on the hardest Wipeout course in history, with the hopes of winning $25,000.

This week, Wipeout will have you saying "Oh Deer!" Bambi makes an appearance along with middle school sweethearts and church camp counselors all for a shot of winning the $25,000 prize.

Jason Alexander guest stars as Sheldon's drama teacher.

Meet 9-year-old Sheldon and his family on the series premiere! Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

Sheldon goes on a quest to make his first friend.

Sheldon's faith is shaken when his dad goes to the hospital.

Joey wants to move back in with Chandler, but there's a new problem. Phoebe tapes a rock video. Ross upsets Monica.

Monica and Richard experience the same romantic problems as Rachel and Ross. Joey's ill-advised comments to a fan magazine threaten his acting career.

Chandler wants his annoying new roommate to move out. Joey's exorbitant bills come due. The women learn from a book about personal empowerment.

Monica's boyfriend impresses Chandler and Joey. Phoebe finds out what she missed as a child.

Two bullies eject Chandler and Ross from Central Perk. Phoebe meets a brother she never knew she had.

Rachel gets a surprise at her birthday party when her parents show up.

When Phoebe catches chickenpox, her chances for romance with a former lover are almost ruined. Monica worries that she is too strange for Richard.

Rachel is a bridesmaid at her ex-fianc?'s wedding. Monica and Richard's relationship is jeopardized when the subject of children is discussed.

Ross' secret fantasy doesn't stay secret for long after he confides in Rachel. Chandler resumes an old relationship.

Ross becomes frantic trying to get everyone ready to leave to hear his speech at the museum.

Monica wants to have a baby. A man is stalking Phoebe.

Chandler wants to commit to a relationship with Janice. Phoebe poses as Joey's agent.

After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure another donation.

Howard contemplates a serious decision in his relationship with Bernadette, and Leonard and Raj's sister start seeing each other again.

Sheldon is in a crisis when he realizes he's not the epicenter of the group, so he decides to find new friends.

Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, forcing him to choose between the two women, and Howard keeps pestering Sheldon with a magic trick.

The guys become sleuths to find out who hacked Sheldon's online-game account.

Sheldon and Amy decide to start rumors about themselves as a social test. Meanwhile, Howard takes his relationship with Bernadette to an even higher level.

Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing.

Raj makes an attempt to cure his phobia of talking to women, and Penny spies on Leonard and Priya with the help of Bernadette.

This summer has been blissful in the Dunphy house, but when Alex returns home from a trip, there is an immediate shift in mood. Elsewhere, Mitch and Cam have returned from their honeymoon, and Mitch is acclimating to real life much quicker than Cameron.

Jay and Gloria can't agree on what kind of gift to give for their anniversary. Meanwhile, the Dunphys go to Alex's college tour, Claire tries to convince Alex to stay close to home, and Phil, Luke and Haley break off to participate in a psyche experiment.

Phil is putting together Mitch and Cam's wedding video for a special family screening, but when the footage reveals that he is responsible for a horrible cold that has plagued the family, he must do some creative editing.

The Dunphys move into a hotel room while their house is getting treated for mold. Phil sees this as a chance to spend quality time together, but Claire and the kids are less excited. Gloria becomes overprotective when Manny starts dating an older girl.

Phil is selling the house next door and he and Claire are excited by the prospect of having wonderful new neighbors. Jay forbids Manny to see his new girlfriend. Elsewhere, Mitch and Cam are determined to switch Lily out of Mrs. Plank's class.

Even though Halloween is Claire's holiday, she allows Phil to take over this year. Gloria picks out costumes for her and Jay, but Jay wants to be Prince Charming instead. Elsewhere, Cameron gets overwhelmed, and Mitchell is busy with a huge case.

Phil and Claire don't know how to feel about Haley and Andy spending a lot of time together. Gloria is pushing Manny to learn Spanish instead of French, so she hires a Spanish tutor. Meanwhile, Mitch and Cam meet a popular news reporter.

Phil and Luke are cooking Thanksgiving dinner this year, but Claire has no confidence in them and prepares a secret backup turkey. Meanwhile, Jay and Gloria's plans to spend the holiday away are ruined when the family dinner gets moved to their house.

When Alex tells Phil and Claire she has a boyfriend, they worry they've put too much pressure on her and she's made up an imaginary boyfriend. Jay and Gloria have parties that they are dragging each other to, but Jay has a plan to get himself out of it.

Haley is turning 21 and the family is taking her to celebrate! Claire wants Haley to start seeing her as a friend, Mitch and Cam realize they aren't as cool as they thought, and Phil and Jay's pit stop to pick up Haley's new car becomes a disaster.

While driving, the Dunphys and Manny have a near-death experience, causing everyone involved to reevaluate their lives, while the rest of the family has to bear the brunt of all their new attitudes.

Claire is furious about neighbors Ronnie and Amber's eye-sore of a boat on their front lawn, and it soon becomes an all-out war. Elsewhere, Jay is trying to potty train Joe, and Cam takes Lily to clown school behind Mitchell's back.

Sheldon refuses to eat solid food after a choking scare.

Sheldon helps his father coach the football team.

Sheldon is determined to prove a NASA rep wrong.

Meemaw refuses to give George Sr. her brisket recipe.

George takes his sons to see a space shuttle launch.

Sheldon tutors his brother when his grades threaten football.

Phoebe tries to be more friendly with her half-brother. Ross meets Isabella Rossellini.

The friends recall secrets from their pasts.

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

Chandler and Janice make a difficult decision about their relationship. Monica accidentally injures Ben and tries to hide it from Ross.

On Thanksgiving, a good-natured football game between the friends reveals some serious rivalries.

Rachel meets a handsome stranger, who might help her career. Chandler gets into trouble with Joey's sisters.

Ross overreacts when Rachel starts working with a handsome guy. Monica becomes enamored with a sexy busboy.

When Monica and Richard accidentally meet, they decide to become friends with dire consequences.

Phoebe's ex-singing partner wants to make Phoebe's signature song, Smelly Cat, a commercial success. Chandler dates a woman with a handicap.

Phoebe becomes involved with a foreign diplomat. Ross becomes involved with another woman after a fight with Rachel.

Ross wakes up with Chloe but an oblivious Rachel wants to resume their relationship.

Ross and Rachel remain apart while their friends feel forced to choose between them.

Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya warming up to one another.

Raj moves in with Sheldon when Leonard and Priya's Star Trek bedroom fantasy is too much for him, and the guys tease Howard when Bernadette gets her PhD, making Howard the only one without a doctorate.

On the fifth season premiere, Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team.

A battle of wills between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya (Aarti Mann).

Attending a co-worker's wedding, Leonard and Amy (Mayim Bialik) get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz!

When Raj is upset he's the only one of the four guys who's not in a relationship, Penny sets out to find the perfect date, introducing him to Emily, a girl he can actually talk to!

Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity!

Sheldon craves attention from his visiting mother.

Sheldon tries to spook his friends on Halloween.

Bernadette & Penny shop for wedding dresses without Amy.

Sheldon must overcome his fear of birds.

Sheldon becomes jealous when Stuart asks Amy for a date.

Leonard comes face-to-face with his high school bully.

Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard, meanwhile, must come to grips with Bernadette's dislike of children.

Sheldon interviews with a school for gifted children.

A trip to Sunday school inspires Sheldon to study religions.

Mary and the twins move in with Meemaw after a fight.

Sheldon's germophobia lands him in detention.

Sheldon and Missy are left home alone for the first time.

Sheldon and Tam make a new friend.

Phoebe is distraught when her brother wants to marry a woman twice his age. While working as a waitress, Monica gets a tip from an admirer worth a small fortune. A hypnosis tape makes Chandler act like a woman.

Ross is upset when Rachel returns his personal belongings and dates Mark. Monica dates a millionaire.

Joey thinks he's found his true love. Rachel's boss dates Chandler, creating big trouble for Rachel. Monica inherits a dollhouse.

When Pete buys a restaurant, Monica must make a difficult decision. Ross makes a sacrifice for Rachel. Joey buys Chandler an unusual pet.

Ross tries to convince Rachel that her date is psychotic. Joey's play gets terrible reviews.

Ross finds a strange growth on his buttocks. Phoebe can't choose between two guys. Monica's boyfriend surprises her.

Monica's boyfriend cannot stop fighting. Chandler's boss is overly friendly.

The friends stay at a beach house. Phoebe meets someone who knows details about her family. Rachel expresses her jealousy of Ross' uninhibited girlfriend.

Ross loves dating Rachel again but hates what he did to accomplish the reconciliation. Phoebe gets to know her mother.

Phoebe thinks her adoptive mother's spirit inhabits a stray cat. Joey's attempt to sell his entertainment center proves hazardous.

Monica tries to prove her mother wrong. Chandler gets into an embarrassing situation while dating Rachel's boss.

Joey makes an odd deal with the building superintendent to prevent him from evicting Rachel and Monica. Phoebe wants to date her sexy massage client.

Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series.

Leonard and Penny "beta test" their relationship.

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname. NASA astronaut Mike Massimino guest stars.

When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab.

When a corner office at the University opens up, Sheldon must compete for it with his office nemesis, Barry Kripke. Meanwhile, Penny receives an unusual gift from Amy.

A group of unlikely heroes band together on a mission to steal the plans to the Death Star, the Empire's ultimate weapon of destruction.