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

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

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

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

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

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

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

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

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

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

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

Sheldon attempts to build a nuclear reactor; a university cocktail party gets heated when Dr. Sturgis' colleague flirts with Meemaw; Georgie is heartbroken when he learns Veronica has a boyfriend.

Sheldon uses his new friendship with the school bully to boss Georgie around; Missy steals Meemaw's makeup for picture day.

Sheldon and Dr. Sturgis have their first fight when Dr. Sturgis marks an answer wrong on Sheldon's test; Mary takes over for Pastor Jeff when he's out sick.

Things spiral out of control when Sheldon boycotts his favorite bread company; Georgie offers Veronica a shoulder to cry on when she's dumped by her boyfriend.

Inspired by his hero, Albert Einstein, Sheldon tries his hand at the violin; Mary and Meemaw secretly buy a pregnancy test when Mary thinks she's pregnant.

Sheldon moves in with Dr. Sturgis for the weekend to see what his life will be like in college; a lonely Mary tries to bond with the other Coopers during Sheldon's absence.

Rachel is asked to be the maid of honor in her ex-fiance's (Mitchell Whitfield) wedding.

Monica, Rachel and Phoebe go on a covert operation to track down the woman who stole Monica's credit card.

Monica's new boyfriend (Stan Kirsch) exposes his own secret after she admits her true age.

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

Rachel discovers Ross' feelings for her when he goes out of town on a business trip.

Rachel decides to look up her former boyfriend (Cosimo Fusco) when she is distraught over Ross' new girlfriend (Lauren Tom).

While tending his son, Ross expresses his displeasure when Phoebe tastes Carol's breast milk to check the temperature.

Monica and Rachel's grumpy downstairs neighbor (Larry Hankin) dies and leaves all his belongings to the girls.

The group is amazed when Phoebe marries a Canadian ice dancer (Steve Zahn) to help him get his green card.

The group's plans of throwing a birthday party are marred when money becomes an issue; Monica gets a promotion; Chandler sets a woman up to get a date with her, but a case of mistaken identities means that he discovers what she really thought of him.

Joey and Chandler decide to baby-sit and use Ben as a way to pick up women; Phoebe loses her job singing at Central Perk.

A drunken Rachel leaves a phone message for Ross that may change their relationship; Chandler regrets asking Monica to help him lose weight.

Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny; the guys think about becoming part owners in Stuart's store.

During their weekend in Las Vegas, Bernadette and Amy accuse Penny of being a buzz kill; the guys try to invent the next big thing.

Raj and Sheldon try to simulate a dark-matter research expedition; after a fight about money, Penny and Leonard turn to Bernadette and Wolowitz for advice.

The guys try to help when Penny is faced with an awkward dilemma at work; Bernadette and Amy discuss sexuality and female scientists.

Sheldon feels pressured to participate in romantic traditions when the gang re-creates a high-school prom on the roof.

Leonard has minor surgery on his nose, causing Sheldon to overreact; Bernadette and Howard work on their marriage.

Sheldon says goodbye to Fun With Flags; Howard, Leonard and Raj look through their dead professor's research; Bernadette learns her co-workers' true feelings.

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

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.

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 Jokers are back as wacky inventors pitching a whole new line of AI-themed gadgets. Then, they fill out bogus incident reports with unsuspecting deli customers. The loser will be forced to demonstrate mentally absurd and physically grueling apps.

Murr, Q and Sal sit alongside a stranger to participate in a documentary-style interview; they try to upcharge guests again as hotel concierge.

The Jokers bring their plastic newborns to the grocery store; they pitch new community programs that the local community will find quite strange.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Unhappy that school funds are going toward football rather than academics, Sheldon decides to run for class president.

Georgie is thrilled when Veronica stays at the Coopers' house for a few days; Meemaw and Dr. Sturgis celebrate their one-year anniversary.

The Coopers help Pastor Jeff through a rough patch in his marriage; Sheldon pressures church members for donations when Mary takes him to work for a day.

Sheldon invites the entire school to a party for the Nobel Prize announcements; Meemaw learns more about Dr. Sturgis' past; Georgie's desire for cable TV leads to a standoff between him and George Sr.

After Dr. Sturgis experiences a nervous breakdown, Mary worries Sheldon is headed down a similar path; Georgie discovers he has a knack for sales.

Without Dr. Sturgis' university class, Sheldon must find a new way to stay academically challenged; Mary helps Pastor Jeff avoid temptation with his girlfriend.

Rachel sees Ross' list comparing her pros and cons to Julie's (Lauren Tom).

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

After deciding to give up acting, Joey is offered a role in a soap opera; Rachel dates a guy named Russ, who is amazingly similar to Ross.

Ross helps put Carol and Susan's wedding plans back on track; Rachel's mother announces shocking new plans.

Joey starts dating a fan (Brooke Shields) who is gorgeous, but soon discovers that she's also crazy; Ross is reminded how much he misses his pet monkey and travels to the San Diego Zoo to find out what has happened to him.

Ross (David Schwimmer) catches up with Marcel on the set of a movie starring Jean-Claude Van Damme; Chandler gets a date with a girl he liked in fourth grade.

Monica's parents drop off some childhood keepsakes including her prom video.

Ross and Rachel finally sleep together; Monica becomes infatuated with one of her parents' friends for whom she caters a party.

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

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 (Adam Goldberg) to move out; Joey is facing some exorbitant bills; the girls learn from a book about personal empowerment.

When the guys agree to do something the girls like, Sheldon and Leonard end up having a confrontation.

Sheldon asks his friends to challenge him in hope of achieving a scientific breakthrough; Wolowitz invents a game about Raj.

Sheldon and Leonard must defend themselves from an online bully's criticism after they co-publish a paper; Bernadette, Penny and Amy confront embarrassing moments during a girls night.

While the gang waits for the reopening of Stuart's comic book store Wolowitz gets some shocking news; Penny has trouble taking her own advice; Leonard and Raj think they spot Nathan Fillion at a restaurant.

Penny and Sheldon design an experiment -- as a joke -- to make participants fall in love; Howard and Bernadette get into trouble at the airport.

Amy finds out that Sheldon applied for a one-way mission to colonize Mars; a trip to the pet store leads to a fight; Leonard has a surprise for Penny; Raj is busted while snooping in Emily's apartment.

A magazine article only credits Sheldon in an article about a paper he co-wrote with Leonard; a blackout at Mrs. Wolowitz's results in a final dinner in her honor.

When Sheldon and Leonard are asked to speak at UC Berkeley, they take a detour in hope of meeting an idol; Raj and Amy try to settle a dispute between Howard and Bernadette with a game of pingpong.

Sheldon and Amy build a blanket fort -- and come to a crossroads in their relationship; Wolowitz meets a half-brother he didn't know he had; Leonard and Penny have an argument during an appearance on Wil Wheaton's podcast.

The guys fight over what message Raj should write for NASA in case of alien contact; Penny has to decide between auditioning for a movie or keeping her pharmaceutical sales job.

Wolowitz questions his engineering skills after he and Sheldon can't get a toy drone to fly; a canceled flight puts Leonard's plans in jeopardy; Raj sets his parents against one another after he's cut off financially.

When Sheldon's and Leonard's mothers finally meet, personalities collide; Howard decides to do his share of the chores -- with a little help from his friends.

Sal, Q, and Murr are sick of hearing the same frequently asked questions about Impractical Jokers, so tonight they're sitting down and answering them once and for all, alongside never-before-seen clips and untold stories.

The Jokers are back as wacky inventors pitching a whole new line of AI-themed gadgets. Then, they fill out bogus incident reports with unsuspecting deli customers. The loser will be forced to demonstrate mentally absurd and physically grueling apps.

A backstage pass to classic episodes of "Impractical Jokers.".

Black Manta wields the power of the mythic Black Trident to unleash an ancient and malevolent force. Hoping to end his reign of terror, Aquaman forges an unlikely alliance with his brother to protect their kingdom and save the world from destruction.

Jaime Reyes finds himself in possession of an ancient relic of alien biotechnology called the Scarab. When the Scarab chooses Jaime to be its symbiotic host, he's bestowed with a suit of armor that's capable of extraordinary and unpredictable powers.

Dylan and Luke are really impressed with Bill's tales of heroism and survival as a firefighter, which make Phil feel emasculated.

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

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

Cam forgets the words to his favorite country song and decides to reconnect with his roots by getting a chicken; when Alex is up for a prestigious government job that requires a family interview, everyone overcompensates and jeopardizes her chances.

Haley needs motherly advice from Claire as she considers her future with Dylan and her career; Jay and Cam's less-than-politically-correct coaching style earns them a class on sensitivity; Mitch runs into Phil's nemesis at an unlikely place.

Sheldon takes matters into his own hands when Meemaw refuses to drive him to a lecture; Georgie tries to impress Veronica with his new business venture.

Sheldon is forced to take a break from science when his new obsession with "The Lord of the Rings" leads to an unhealthy habit; Missy asks George Sr. to teach her how to play catch.

After being released from the mental hospital, Dr. Sturgis unexpectedly breaks up with Meemaw.

A church carnival leads Missy to try out for the baseball team; Meemaw struggles after her breakup with Dr. Sturgis.

Sheldon starts an internet flame war; Missy stands up to the boys on her baseball team; Meemaw is unhappy when George Sr. spends time with her new boyfriend.

The University makes George Sr. a lucrative job offer in hopes of recruiting Sheldon; Georgie gets a job working for Meemaw's new boyfriend; Mary is determined to rid her home of greed.

Monica's boyfriend proves to be the life of the party when he attends a basketball game with Chandler and Joey.

Two bullies (Peter DeLuise, Nicky Katt) banish Ross and Chandler from Central Perk; Monica plays the stock market.

Rachel's separated parents (Marlo Thomas, Ron Leibman) unexpectedly attend her surprise birthday party.

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

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

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

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

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

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

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

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

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

Leonard tries to ease Penny's mind; Sheldon plans a special episode of "Fun With Flags"; Bernadette feels bad about keeping a secret.

A flat tire during Leonard's bachelor party weekend in Mexico tests the guys' skills; Penny is compelled to tell her family that she and Leonard eloped.

An impending change to his living arrangements inspires Sheldon to revert to 2003, before he met Penny and Leonard; Raj and Howard form a band.

Barry Kripke expresses interest in Amy while leading a fencing lesson for the guys; when Stuart tries to attract female customers to the store, Penny, Amy and Bernadette help out.

Leonard and Sheldon go to great lengths to secure the helium they need during a nation-wide shortage; Bernadette and Penny try to find Amy a new man on a dating app.

Sheldon struggles to keep his emotions in check when he is interviewed for a documentary about Spock; Penny and Leonard make a surprising discovery; Wolowitz and Bernadette get into a disagreement about remodeling his childhood home.

Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon; Penny and Bernadette decide to spy when Amy is secretive about who she is dating.

Amy and Sheldon spend Thanksgiving at the aquarium -- as friends; Wolowitz volunteers at the soup kitchen with Raj, Emily and Bernadette; Penny realizes that Leonard knows her better than she thought.

A wedding singer loses all hope when he is abandoned at the altar by his fiancée. He meets a young woman named Julia, who enlists his help to plan her wedding. He falls in love with her and must win her over before she gets married.

A thirty-two-year-old law school graduate living off a meager lawsuit award adopts a five-year-old boy in a misguided attempt to impress his girlfriend, who is about to break up with him.

A wedding singer loses all hope when he is abandoned at the altar by his fiancée. He meets a young woman named Julia, who enlists his help to plan her wedding. He falls in love with her and must win her over before she gets married.

A thirty-two-year-old law school graduate living off a meager lawsuit award adopts a five-year-old boy in a misguided attempt to impress his girlfriend, who is about to break up with him.

The magical hot tub sends Lou (Rob Corddry), Nick (Craig Robinson) and Jacob (Clark Duke) to the year 2025 to prevent an unknown assailant from shooting Lou.

The Jokers steal America's babies at the mall; while they lie in wait trying to succeed in an impossible task, Sal, Q and Murr hash on some never before seen clips.

Sal and Murr air out their dirty laundry by sorting out the whites and colors of their relationship through past clips from the "Couples Therapy Special" with Casey Jost, unlicensed therapist.

Claire and Phil plan a Valentine's Day excursion; Jay takes Gloria to a comedy show; Cameron and Mitchell try to play cupid for Manny.

Claire and Phil decide to reprise their role-playing adventure from the previous year; Jay's elaborate Valentine's surprise for Gloria keeps getting held up; an admirer comes between Cameron and Mitchell.

Claire and Phil's Valentine's Day romp ends with Claire in the hospital; Jay and Gloria's attempts at romance are interrupted by the kids; after hosting a wild party, Cam and Mitch are left with hangovers and a new housemate.

Claire senses Phil may be more into "Juliana" than her; Gloria's sister visits; Mitchell and Cameron get into a situation with Anders.

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

The Pritchett-Dunphy-Tucker clan heads to Paris so Jay can accept a lifetime achievement award for his work in the closet industry; Claire has a secret rendezvous; Cam finally gets a chance to perform as Fizbo on the streets of Paris.

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

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

Ross (David Schwimmer) catches up with Marcel on the set of a movie starring Jean-Claude Van Damme; Chandler gets a date with a girl he liked in fourth grade.

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

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

Ross starts dating a beautiful but messy co-worker from the museum; Monica and Phoebe cater a sad event.

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

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

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

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

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

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

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

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

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

After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.

Sheldon has a personal crisis when he decides string theory is a waste of his time; a double date ends in embarrassment for Howard.

Sheldon feels pressured to participate in romantic traditions when the gang re-creates a high-school prom on the roof.

Sheldon, Wolowitz and Koothrappali post an ad online to find a new girlfriend for Sheldon; Penny and Bernadette decide to spy when Amy is secretive about who she is dating.

Sheldon and Amy go crazy trying to figure out what "perfect gift" Leonard and Penny gave them for their wedding; Koothrappali decides to settle down and asks his father to arrange a marriage for him.

A harried patriarch (Steve Martin) faces separation anxiety, exorbitant costs and more as he prepares for his daughter's (Kimberly Williams) wedding.

A worrisome family patriarch (Steve Martin) is driven to further distraction by the simultaneous pregnancies of his wife (Diane Keaton) and daughter.

Bestowed with the almighty powers of the gods, Black Adam's unique form of justice, born out of rage, is challenged by modern-day heroes who form the Justice Society: Hawkman, Dr. Fate, Atom Smasher and Cyclone.

Billy Batson is a streetwise 14-year-old who can magically transform into the adult superhero Shazam simply by shouting out one word. His newfound powers soon get put to the test when he squares off against the evil Dr. Thaddeus Sivana.

Sal, Q, and Murr are sick of hearing the same frequently asked questions about Impractical Jokers, so tonight they're sitting down and answering them once and for all, alongside never-before-seen clips and untold stories.

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

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

The Jokers' mothers visit as overprotective parents meeting a Joker's girlfriend; a Joker must convince a stranger to pose as his girlfriend for a Broadway outing with his mother.

The Jokers are back as wacky inventors pitching a whole new line of AI-themed gadgets. Then, they fill out bogus incident reports with unsuspecting deli customers. The loser will be forced to demonstrate mentally absurd and physically grueling apps.

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

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

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

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

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

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

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

Phoebe can't communicate with her new boyfriend, a UN diplomat who doesn't speak English; Ross seeks solace at a party after a bitter fight with Rachel.

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

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

Phoebe's brother wants to marry a woman twice his age; Monica gets a huge tip from an admirer.

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

Monica's aunt dies and leaves her an antique dollhouse that she doesn't want Phoebe to play with; Rachel regrets making a date for Chandler and her boss, Joanna; Joey's interest in Kate intensifies.

Monica considers accepting a dream job in Pete's new restaurant but fears there is more to the deal; Ross makes a sacrifice for Rachel.

Worlds collide when the Flash travels back in time to change the events of the past. However, when his attempt to save his family alters the future, he becomes trapped in a reality in which General Zod has returned, threatening annihilation.

Bestowed with the almighty powers of the gods, Black Adam's unique form of justice, born out of rage, is challenged by modern-day heroes who form the Justice Society: Hawkman, Dr. Fate, Atom Smasher and Cyclone.

Sheldon has a song stuck in his head; despite their awkward date, Amy asks Dave over for dinner; Koothrappali and Wolowitz are obsessed with a fan of their band.

After dating for more than five years, Amy and Sheldon spend the night together for the first time; Leonard, Wolowitz, and Koothrappali must decide what to do with an extra movie ticket.

Leonard agrees to meet with a psychiatrist (Jane Kaczmarek) on Penny's behalf; Sheldon and Koothrappali work together on an astronomical discovery; Wolowitz and Bernadette struggle with their feelings when Stuart moves out.

After dealing with Sheldon while he was sick, Leonard, Penny and the gang attempt to treat themselves to a Sheldon-free weekend.

Sheldon's excitement about his Meemaw's visit fades when she butts heads with Amy; Raj questions his relationship with Emily after meeting someone new.

Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Penny and Leonard wrestle with getting older; Howard and Bernadette make a discovery in their hot tub; Raj is torn between Emily and another woman.

After a wild stag party in Las Vegas, three hazy groomsmen (Bradley Cooper, Ed Helms, Zach Galifianakis) must find their missing friend and get him back to Los Angeles in time for his wedding.

Hoping to avoid the mayhem that marked his friend's Las Vegas bachelor party, Stu opts for what he thinks will be a safe prewedding brunch in Thailand.

Phil, Stu and Doug take Alan on a road trip to help him through a personal crisis. Mr. Chow breaks out of prison and prepares to wreak havoc.

Steve and Eddie (Jaleel White, Darius McCrary) visit a gambling hangout to raise money after Eddie wrecks the family car.

Laura starts a campaign to have a black history course taught at her school.

Mary gets Pastor Jeff involved when Sheldon isn't invited to Billy's birthday party; George Sr. has male bonding time with Dr. Sturgis.

Sheldon fakes being sick to avoid a swim test at school; Dr. Sturgis spies on Meemaw's new boyfriend.

George Sr. and Meemaw struggle to manage the Cooper household; Mary plans Pastor Jeff's wedding.

Sheldon learns to listen when an emotional Paige struggles with her parents' divorce; George Sr. is furious when Georgie tries to buy his way out of chores.

George Sr. and Georgie go camping with Meemaw's new boyfriend, but things get complicated when her ex-boyfriend tags along; Sheldon and Missy invent a game.

Sheldon and Georgie mine for platinum in roadside gravel; Mary is concerned when Missy misuses religion to help with a batting slump.

After a wild stag party in Las Vegas, three hazy groomsmen (Bradley Cooper, Ed Helms, Zach Galifianakis) must find their missing friend and get him back to Los Angeles in time for his wedding.

Hoping to avoid the mayhem that marked his friend's Las Vegas bachelor party, Stu opts for what he thinks will be a safe prewedding brunch in Thailand.

Phil, Stu and Doug take Alan on a road trip to help him through a personal crisis. Mr. Chow breaks out of prison and prepares to wreak havoc.

Amy and Sheldon host a Valentine's Day edition of Fun With Flags; Penny and Leonard wrestle with getting older; Howard and Bernadette make a discovery in their hot tub; Raj is torn between Emily and another woman.

The gang celebrates news of Bernadette's pregnancy by singing karaoke; Wolowitz's reaction to the pregnancy announcement worries Bernadette; Wolowitz believes he needs to make more money to support his growing family.

For the first time in nine years, the gang celebrates Sheldon's birthday -- surprising him with a special guest.

Leonard, Sheldon and Wolowitz file for a patent on their new invention; Penny, Amy and Bernadette give dating advice to Koothrappali after his breakup with Emily.

Sheldon makes a surprise revelation when Amy buys him a new laptop; Leonard and Wolowitz get sold out by Koothrappali after lying to their wives to attend a movie screening.

Sheldon shares a secret about Leonard when the two go on a weekend trip with Penny and Amy; Koothrappali goes all out with pregnancy gifts.

During a group get-together, a minor argument between Sheldon and Leonard turns into a heated debate, leaving the rest of the gang to choose sides.

The gang runs into Penny's old boyfriend while out at a wine bar; Bernadette spends an evening with Sheldon; Koothrappali's introduction of his new girlfriend doesn't go as planned.

Sheldon wants to go to a movie screening, so he pays Stuart to spend the day with Amy; Penny has a difficult time connecting with Leonard's visiting mother.

Leonard's recently divorced parents and Sheldon's devoutly religious mother visit; when they are contacted about their guidance system, Wolowitz and Koothrappali think the government is after them.

The group struggles through an awkward morning after Sheldon's mother and Leonard's father spend an evening together; Penny's family arrives.

Wolowitz has a meeting with Colonel Williams, a representative from the Air Force Department of Material Command.

Sheldon tries to stay awake with an energy drink as the gang races to finish its government project on time; Penny and Amy attend a gathering at Bert the Geologist's house; Koothrappali learns Bernadette's true feeling about her pregnancy.

After her apartment floods, Amy suggests that she and Sheldon move in together; Koothrappali finds out the gender of Howard and Bernadette's baby before they do.

Things do not run smoothly when Amy moves in with Sheldon, and Leonard and Penny have to intervene; Howard and Bernadette find unexpected guests at their house when they decide to cancel their vacation plans.

Penny learns there are fans of her performance in "Serial Ape-ist" when she and Leonard attend a Comic Con event; Amy hosts a brunch at Penny's apartment; Wolowitz makes an impulsive purchase.

When Dede's husband comes to town to bequeath her possessions to the family, Jay and Gloria feel sorry for him and invite him to stay with them while he is in town.

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

Claire and Phil aren't convinced that Haley and Dylan can make it on their own as they move them into their new apartment before the baby arrives; Pameron gets out of prison early and has a bone to pick with Mitchell.

Phil and Claire decide to take a cycling tour through Italy; Cameron and Mitchell discover some interesting reading material in Lily's room.

Cam must contend with a bully at the school; Jay has technical trouble during a video conference; the local mall holds a photo shoot for its new ad campaign, and Gloria tricks Phil and Joe into participating.

Phil thinks he found Pepper his dream home; in an attempt to connect with Lily, Mitch and Cam get invited to an exclusive event for her favorite vlogger.

Jay hosts a Super Bowl party at the same time that Claire hosts a baby shower for Haley, both at Jay's house.

Lily reaches a womanly milestone that Cam and Mitch are not prepared for -- at all -- so they call in reinforcements.

Francine plots to destroy George Clooney for a past indiscretion; Roger builds a vineyard and starts a private sweatshop.

Steve accidentally ends up in a refugee camp; optimistic Stan joins him and starts a camp Olympics between the refugees and the rebel faction across the river.

Steve and Carl both learn a lesson about when to take credit for their achievements.

The unexpected visit of a mysterious person from Harriette's past leaves Carl speechless.

Carl wants a promotion; Lt. Murtagh wants to date Rachel.

Carl dreams that he is facing Two-Gun Urkel, the most annoying gunslinger in the West.

Meemaw meets Dale's ex-wife, June; Sheldon is forced to work on a group project with reluctant college students.

Sheldon visits the California Institute of Technology for the very first time; Georgie is furious when Mary listens in on a phone call with his girlfriend; Meemaw tries to cheer up a jealous Missy.

Dr. Sturgis is furious when Sheldon accuses him of plagiarism; Mary sets out to find a girl trophy for Missy's end-of-season baseball ceremony; Georgie has an awkward run-in with Veronica while on a date with his new girlfriend, Jana.

When George Sr. accidentally lands the school librarian in the hospital, the Cooper family must nurse her back to health; Meemaw gives Georgie relationship advice.

When Sheldon learns the house next door is for sale, he takes it upon himself to find the perfect neighbors; Missy is torn when she's forced to pitch against her boyfriend at a baseball game.

Sheldon has a scientific breakthrough at the dentist's office; Dale and Meemaw go to the casino; Georgie makes a big mistake when Dale leaves him in charge of the store.

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

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

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

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

Ross dates Rachel again after unwittingly agreeing to take responsibility for their breakup; Phoebe reconciles with her mother; Monica is stung by a jellyfish.

Phoebe becomes convinced that the spirit of her dead mother is inside a cat; Chandler and Joey are robbed; Monica goes on a date with a guy from her high school.

Rachel's boss, Joanna, leaves Chandler in an awkward situation that will require Rachel's help; Monica's catering fiasco.

Joey intervenes when the superintendent, Mr. Treeger, moves to evict Rachel and Monica; Chandler tries to quit a health club.

Chandler falls for a woman who is already involved with Joey; Rachel and Ross play the jealousy game.

Ross starts dating a beautiful but messy co-worker from the museum; Monica and Phoebe cater a sad event.

Chandler faces a tough choice after his passionate kiss with Joey's girlfriend; Rachel has to learn about dining alone.

To atone for kissing Joey's girlfriend, Chandler agrees to stay inside a shipping crate during the Thanksgiving holiday.

Amy lies about repairs being made to her apartment so she can continue living with Sheldon; Leonard lets Penny decorate Sheldon's old room.

Sheldon is determined to convince Amy they should procreate; Koothrappali is reluctant to tell the gang what the new woman he's dating does for a living.

Sheldon gets jealous when a co-worker wins an award; Wolowitz finds an old remote control Stephen Hawking action figure that he made.

Sheldon and Leonard disagree about how to divide their shared belongings; Koothrappali and Stuart fight to be the most helpful to Bernadette during her final weeks of pregnancy.

While Howard and Bernadette welcome their new baby into the world, Amy celebrates her own birthday with Sheldon.

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

Penny thinks Leonard is taking her for granted and decides to go on a spa weekend with Amy; Wolowitz and Koothrappali try to fix a squeaky floorboard in the baby's room.

Sheldon tests an MIT invention after hearing it can help him read people's emotions; Leonard finds out Penny's brother is coming to town; Raj asks his ex-girlfriends to give him dating advice.

Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system; Raj and Stuart look after baby Halley while Penny and Amy take Bernadette for a night out.

Sheldon and Amy have their first fight since moving in together; Koothrappali is shocked at the realities of financial independence when he stops receiving support from his father.

Cut off from his father's fortune, Koothrappali appoints Sheldon to help him get out of debt; Penny considers joining Leonard at Comic-Con.

Leonard and Penny offer Sheldon's old room to Raj after he moves out of his apartment.

Leonard, Penny and Raj settle into their new living arrangement; Sheldon expresses interest in Amy's work.

Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Wolowitz as well as Amy on the same day; Bernadette nears the end of her maternity leave and must return to work.

Howard and Bernadette struggle to leave Halley in day care; Bert introduces the gang to his new girlfriend, Rebecca.

Leonard is less than thrilled when Penny considers accepting a job offer from Zack, her ex-boyfriend.

Mitch, Cam and Phil crash Jay's annual hiking trip to find an elusive bald eagle after Gloria asks them to keep an eye on him; Gloria, Alex, Claire and Haley get together to plan her baby shower.

Dylan and Luke are really impressed with Bill's tales of heroism and survival as a firefighter, which make Phil feel emasculated.

In an effort to be less negative, Claire inadvertently approves of Luke's new relationship with someone from his work; Phil tries to surprise Alex at school right before she receives an award she didn't tell him about.

Haley and Dylan's plan to quietly elope before the babies are born doesn't go as smoothly as they had hoped; Jay continues to try and get his new business off the ground by courting an Instagram celebrity.

Cam finally gets a chance to shine when he is asked to preside over the high school graduation ceremony at the last minute; Jay gives the commencement address; Claire runs into her former high school rival who brings out the worst in her.

The birth of Haley and Dylan's twins approaches; a look back at how the family members celebrated their birthdays over the past year.

Haley is determined to follow the advice in her parenting books, but Phil and Claire think their old methods are better; Manny is set to direct Jay's dog bed commercial in hopes of winning his ex-girlfriend back.

Claire needs to get everyone out of the house before they make her look bad in front of a reporter from an important women's business magazine; Jay invites Manny to a wine tasting in an attempt to spend some quality time together.

Phil, Claire, Alex and Luke realize the babies might help them with a few things on their to-do lists, so they offer to give Haley the day off.

Mitch and Cam help Lily overcome her insecurities about wearing a bathing suit to a pool party; with Gloria's new internship taking up so much of her time, Jay starts feeling particularly neglected.

Phil is determined to scare Claire on Halloween; Gloria feels self-conscious about her age when someone correctly assumes she is Jay's wife; Mitch and Cam go to the WeHo Halloween Carnival after Lily decides to go to her first Halloween party alone.

Gloria uses her alone time with the twins as an opportunity to secretly baptize them before Haley and Dylan get home; Claire deals with the fallout from the smart closet fiasco; Cam feuds with his school's mascot.

Cameron and Mitchell's friends mistakenly assume they have split up; Haley attempts to cook Thanksgiving dinner as a thank you for Claire and Phil's support with the twins; Jay invites Phil and Dylan out to fly his model plane.

The Dunphy house is bursting at the seams when Dylan's hippie mom moves in and Claire's lonely stepdad, Jerry, wants to pay them a visit; Jay and Gloria attempt to help Manny get over his big breakup with Sherry.

Sheldon discovers that Mary's been keeping a secret about him; Meemaw is furious when she learns Dale fired Georgie.

After graduating high school, Sheldon has a breakdown when he realizes he may not be ready for college; Dale tries to make amends with Meemaw.

Sheldon gets a summer job at the local train museum; Missy embarks on a new stage of womanhood; Georgie discovers Mary's guilty pleasure.

With college in sight, Sheldon is determined to ride his bike without training wheels; Mary and George Sr. argue over parenting styles.

Sheldon finds himself in a fierce competition with Paige when their mothers force them to attend Vacation Bible School; George is furious after Georgie makes a questionable purchase.

Dale and Meemaw work out relationship issues while playing Dungeons and Dragons with Sheldon and Missy; Mary and George take a trip with coach Wilkins and his wife; Georgie's girlfriend thinks she's pregnant.

Rachel's career is obstructed by her boss, Joanna; Monica faces a big decision; Chandler, Ross and Joey party.

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

Phoebe'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 and his wife; Monica and Rachel wager their apartment in a trivia game against Chandler and Joey.

Chandler has a hard time handling Kathy's new role, in which she pretends to have sex with a handsome man; Rachel is attracted to a customer when she's demoted to personal shopper; Monica decides that Joey's new place is built for entertaining.

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.

Chandler runs into Janice, now divorced, and finds her more irritating than ever; Ross plays rugby to impress Emily; Monica tries to figure out what a mysterious electrical switch in her new apartment does.

Rachel throws Emily a phony going-away party so she can see Joshua outside of work; pregnant Phoebe craves 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.

After celebrating the completion of the top-secret Air Force project, Leonard, Sheldon and Wolowitz get an unwelcome surprise; Amy receives an offer for a summer position as a visiting researcher.

The gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

Amy answers Sheldon's marriage proposal; Howard and Bernadette struggle with unexpected news.

Leonard's job is at stake after he gives an embarrassing radio interview; Amy and Bernadette bond over having to hide their success from Sheldon and Howard.

As Sheldon stresses about picking a wedding date, Amy tries to convince him he has a more laid-back side; Koothrappali and Stuart compete to win the heart of Bernadette's new co-worker.

Wolowitz and Sheldon bond over having disappointing fathers; Leonard is disturbed when his mother finds a new best friend in Penny.

Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together; Penny and Leonard learn a secret from an unlikely source about dealing with Sheldon.

Sheldon auditions for the role of the new Professor Proton; Penny takes care of Halley when Bernadette and Wolowitz need bed rest.

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 Jokers play lawyers trying to convince unsuspecting focus group participants to sign off on ridiculous terms and conditions before they go in.

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

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

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

Alex's company puts her up at a new luxury apartment building with a number of high-profile residents that the family is eager to take advantage of; Phil is on a mission to review the restaurant's famous sliders for his food blog.

Phil pays a visit to his dad after hearing some concerning news about him; Jay gives Claire and Mitch a bunch of their old childhood memorabilia that triggers them to reevaluate a long-held story about their first family vacation.

Mitchell learns a valuable life lesson when a former resident of the house shows up unexpectedly; the Dunphys' old neighbor-turned-tech-titan, Kenneth, comes to visit with a big surprise for Phil; Manny's dad has a big opportunity for his son.

The Pritchett-Dunphy-Tucker clan heads to Paris so Jay can accept a lifetime achievement award for his work in the closet industry; Claire has a secret rendezvous; Cam finally gets a chance to perform as Fizbo on the streets of Paris.

Phil and Claire take Haley and Dylan to dinner to reassure them they are not bad parents; Mitch and Cam chaperone on Lily's first date; Jay and Gloria attend Joe's school play.

Claire lands an interview for her dream job but is thwarted on her way to the interview by Phil's tricky staircase; Cam and Mitch debate the pros and cons of adopting another baby.

Mitchell is having a hard time letting go of his old life and Gloria steps in to help him say goodbye; Haley, Luke and Alex decide to throw a party at the Dunphy house when Claire and Phil leave for a trip; Dylan's mom takes the twins for the night.

Mitchell and Cam settle into their new normal; Phil and Claire decide that one of the kids needs to move out; as Gloria becomes more successful at work, she notices Jay and the kids don't seem to need her as much.

The family struggles with goodbyes.

Jay has grown children, grandchildren and a gorgeous young wife, who has a preteen son of her own; all together they must bridge generational, cultural and social gaps.

Phil is determined to help Luke prove he is responsible enough to have a new bike; Jay and Manny have some father and son time.

Jay reluctantly takes Phil on a model-airplane excursion, and Gloria goes shopping with Alex. Meanwhile, Claire and Manny get to know each other as siblings.

Jay's ex-wife, Dede (Shelley Long), tries to make amends with everyone she offended at Jay and Gloria's wedding.

Tensions rise during a day of barbecue and football at Jay and Gloria's in the wake of an incident between Manny and Luke at school.

College orientation does not go as Sheldon planned; Mary is invited to a party when she's mistaken for a university student; George Sr. helps Pastor Jeff set up a children's nursery.

Sheldon's first day of college is derailed by his new philosophy teacher, professor Ericson; Mary and Brenda live vicariously through Missy's first day of middle school.

Meemaw takes matters into her own hands when Sheldon's philosophy teacher sends him into a tailspin; George Sr. learns Georgie has been cutting class.

Sheldon and George Sr. have dinner with President Hagemeyer and a university benefactor; Georgie gives Missy some brotherly advice when Mary won't let her go to the school dance; Dale and June convince Meemaw to attend their son's wedding.

Sheldon campaigns to become Dr. Linkletter's lab assistant; Georgie enlists the help of Mr. Lundy, the drama teacher, for a business venture.

Dr. Linkletter pushes Sheldon to make friends with his fellow students at college; Georgie gets a pager.

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.

After Joey almost loses Ross' wedding ring, Ross asks both Joey and Chandler to serve as his best man; the girls host a baby shower for Phoebe.

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; Joey gets admitted in great pain; Monica plans a date with a male nurse to spite Chandler.

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.

Phoebe is surprised to discover that she enjoys wearing mink; Ross confronts Emily, and she demands a divorce; Monica and Rachel are afraid of a hairy new neighbor, until they find out how handsome he is with his hair cut.

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.

Sheldon tries to keep his collaboration with Bert a secret; Penny and Bernadette coach Koothrappali on navigating his relationship with Ruchi.

Leonard and Wolowitz are furious when they learn Sheldon worked with the military behind their backs; Bernadette suspects Ruchi is trying to steal her job.

Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable investment; a seven-year-old video reveals a secret about Leonard and Penny's relationship.

Sheldon and Amy try to use math to eliminate wedding planning stress; Koothrappali "breaks up" with Wolowitz after realizing he is hurting his confidence.

Sheldon plans an authentic "Little House on the Prairie" dinner for Amy's birthday; Leonard receives a Christmas letter from his brother.

Sheldon and Amy subject their friends to a series of secret experiments to discover which two would be most qualified to be the best man and the maid of honor at their wedding; Penny reveals her true feelings about Amy.

Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments; Bert replaces Wolowitz in the band; Sheldon finds Penny a surprising source of scientific inspiration.

Koothrappali learns the woman he's dating has a very upset husband; Sheldon rents his old room for a quiet place to work.

Sheldon petitions Wil Wheaton to appear on the new "Professor Proton" show, but Wil offers a role to Amy instead; Penny gets angry when she thinks the female protagonist in Leonard's novel is based on her.

When Bernadette won't go into labor, her friends try different tactics to get things started; Wolowitz confronts Bernadette after Amy accidentally reveals she's already chosen their son's name.

Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy; Bernadette and Wolowitz have a hard time deciding who should stay at home with the kids and who should go back to work.

Penny gets the opportunity to host Bill Gates at work when his company wants to partner with hers; Leonard, Koothrappali and Wolowitz do everything in their power to meet him; Sheldon thinks he is the victim of a prank.

The Jokers pretend to be bellhops and need to do and say what they're told while assisting unsuspecting guests to their rooms. Then, the guys need to give away tickets to an absurd made-up show they can no longer see.

The Jokers are hitting the floor as restaurant owners of a New York Pizzeria, forced to say and do whatever wacky things the other guys tell them to.

A backstage pass to classic episodes of "Impractical Jokers.".

Soldiers and civilians travel to the year 2051 to join a global war against a deadly alien species.

A security expert must infiltrate a burning skyscraper, 225 stories above ground, when his family is trapped inside by criminals.

Steve steals an orangutan from a science lab; Carl steps on a treadmill booby-trapped with a bomb.

Steve challenges another student to a rope-climbing competition to impress Laura.