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.

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.

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

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

When the press learns that Sabre's printers catch on fire, Jo tries to find out who the whistle-blower is.

Michael refuses to fire the new office assistant (Evan Peters) when people complain about his bad attitude; Pam tries to impress Jim by pulling an office prank.

Corporate forces Michael into counseling with Toby; Dwight seeks revenge after a shop owner snubs him; Pam tries to change her job title.

Andy invites the office to a play he is in, hoping that Erin will attend; Jim and Pam struggle with their incompetent babysitter.

Thinking he has herpes, Michael contacts all his ex-girlfriends; Andy holds a sex education meeting for the office.

Michael, Dwight and Jim set up a sting after a competing sales associate steals a client; Andy starts a band.

Michael freaks out when Darryl goes over his head and takes an idea to corporate; a Halloween costume contest puts the office in a competitive mood.

Michael invites the entire office to celebrate the christening of Pam and Jim's baby.

Erin and Gabe host a "Glee" viewing party; Michael is upset when people refer to Gabe as his boss; Andy becomes increasingly jealous.

Michael helps convince people to invest in Ryan's Internet company; trying to capitalize on Thanksgiving, Dwight creates a hay festival in the parking lot; a new policy prevents Jim from earning commission.

Michael decides he must stop China before it takes over the United States; Pam threatens to move the company to a new building.

Michael is happy when Toby takes a leave of absence and corporate sends Holly Flax to fill in; Pam must plan a second Christmas party when Michael wants the party to be on the day of Holly's return to Scranton.

Michael is happy when Toby takes a leave of absence and corporate sends Holly Flax to fill in; Pam must plan a second Christmas party when Michael wants the party to be on the day of Holly's return to Scranton.

Michael readies himself for the news about Holly's relationship; Pam puts up a board for everyone to post their New Year's resolutions.

Jay, Gloria and Manny challenge one another to try something new; Mitch and Cam sell a couple of their prized possessions to fund the wedding; the kids play a joke on Phil and Claire.

A series of crises on Mitch and Cam's wedding day put Pepper to the test; Phil gets an eye procedure before the celebration; Claire embraces the role of best woman.

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'll stop at nothing to prove them wrong; Dale is forced to get a colonoscopy and tries to convince Meemaw to join him.

Sheldon is caught in a moral dilemma when offered a bootleg copy of a computer game he can't afford; Mary and Meemaw take Brenda out for girls' night; Missy asks Georgie to take her and Marcus on a secret date.

Sheldon finds himself at odds with Paige when she considers enrolling at East Texas Tech.; Mary seeks June's advice when looking for a change.

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

Missy's first disappointment in love triggers a series of events that leads the Cooper family to the edge of an abyss.

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

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

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

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

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

When the girls lose money to the guys in a poker match they seek out Monica's Aunt Iris, a famous card player, for lessons and then demand a rematch.

Rachel accidentally lets Ross' pet monkey escape, and the friends form a search party; she is then horrified to learn that her former best friend is engaged to her ex-fiance.

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.

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 feelings 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.

NBA star Bam Adebayo pulls WNBA MVP A'ja Wilson into an uncomfortable autograph scandal; Anthony Davis drops NFL star safety Quentin Lake and NFL analyst Jay Glazer into chaos during a competition show gone wrong.

Anthony Davis and Dude Perfect's Cody Jones push Dereck Lively into a game-show disaster, while USC basketball player JuJu Watkins and coach Lindsey Gottlieb prank their team with a fake meeting that leaves them stranded on a haunted abandoned floor.

Anthony Davis pranks former NFL tight end Marcedes Lewis when a routine valet drop-off turns into joyrides and errands; NBA coach Jason Kidd sends NBA player Cooper Flagg into a rookie symposium that devolves into awkwardness.

Olympic gold medalist Tara Lipinski unknowingly becomes the target of Anthony Davis's elaborate prank, while former NFL quarterback Robert Griffin III attends a feel-good locker-room dedication that doesn't go as planned.

Dunder Mifflin traveling salesman Todd Packer comes to the office looking for a desk job; Andy fights Pam for a new computer.

Michael decides to ask Holly to marry him; the office has a garage sale.

Everyone hopes to make good first impressions with the new manager, Deangelo Vickers.

Michael teaches DeAngelo (Will Ferrell) how to host the Dundie Awards; Erin struggles with her feelings for Gabe.

Michael wants a drama-free day to say goodbye to his friends; Deangelo and Andy work to keep Michael's most-important clients.

Michael wants a drama-free day to say goodbye to his friends; Deangelo and Andy work to keep Michael's most-important clients.

Deangelo plays favorites by creating an inner circle of most liked employees, and the women notice it seems to be all guys.

Dwight uses his position as acting manager to employ harsh policies in the office; Gabe tries to get Erin back.

After breaking up with her boyfriend, Haley finds herself in the arms of Stan's body double from the CIA.

Roger suggests that Stan hold a telethon to raise funds after the CIA's budget gets cut; when Stan takes credit for the idea, Roger is infuriated.

Chaos forces Mitch and Cam to move from one contingency plan to another, but an unexpected turn of events allows the day to move forward.

When Alex returns from a humanitarian trip, the family dynamic shifts; Cameron remains in a lovey-dovey mood even after the honeymoon ends; Gloria gives Jay a taste of his own medicine after noticing the lack of effort he puts into his appearance.

Sheldon and Missy both run away from home together; Mary gets some upsetting news about her husband, George.

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

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

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

Sheldon and Dr. Linkletter struggle to solve an equation; Georgie has a solution for Meemaw's business woes; George Sr. gives advice on Missy's love life.

Missy asks some uncomfortable questions at church; Meemaw and Georgie go into business together.

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.

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.

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.

A rude, drug-abusing educator (Cameron Diaz) vies with a perky colleague (Lucy Punch) for the attentions of a rich and handsome substitute teacher (Justin Timberlake).

Barbie and Ken are having the time of their lives in the colorful and seemingly perfect world of Barbie Land. However, when they get a chance to go to the real world, they soon discover the joys and perils of living among humans.

Four couples find that paradise comes at a price when they must participate in therapy sessions at a tropical resort.

Armed with a clear vision and a brazen, 78-page plan, determined father and coach Richard Williams inspires his two daughters, Venus and Serena, to become tennis champions.

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

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

Anthony Davis pranks NFL linebacker Daiyan Henley with a lost-pet charity; pro-wrestler Sting pushes Darby Allin into a tense moral standoff.

NHL forward Wyatt Johnston and Howie Mandel set up NHL defenseman Lian Bichsel at a restaurant where a romantic proposal meltdown turns him into the unwitting villain.

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.

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).

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

A rude, drug-abusing educator (Cameron Diaz) vies with a perky colleague (Lucy Punch) for the attentions of a rich and handsome substitute teacher (Justin Timberlake).

Four couples find that paradise comes at a price when they must participate in therapy sessions at a tropical resort.

A plastic surgeon (Adam Sandler) enlists the aid of his assistant (Jennifer Aniston) and her children to help him win the heart of a beautiful woman.

A plastic surgeon (Adam Sandler) enlists the aid of his assistant (Jennifer Aniston) and her children to help him win the heart of a beautiful woman.

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

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

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.

NBA star Bam Adebayo pulls WNBA MVP A'ja Wilson into an uncomfortable autograph scandal; Anthony Davis drops NFL star safety Quentin Lake and NFL analyst Jay Glazer into chaos during a competition show gone wrong.

The team scouts for the next child star while trying not to laugh as Dan Jost reads his honest movie reviews in a focus group.

NBA star Bam Adebayo pulls WNBA MVP A'ja Wilson into an uncomfortable autograph scandal; Anthony Davis drops NFL star safety Quentin Lake and NFL analyst Jay Glazer into chaos during a competition show gone wrong.

Jim heads a team that interviews applicants, including several co-workers; Dwight tries to reassert himself as a contender.

Anthony Davis lures former NFL defensive lineman Gerald McCoy into a movie audition where he damages superhero memorabilia.

Jim heads a team that interviews applicants, including several co-workers; Dwight tries to reassert himself as a contender.

Jim heads a team that interviews applicants, including several co-workers; Dwight tries to reassert himself as a contender.

The staff go into frantic speculation after accidentally discovering a list of their names in a notebook belonging to the mysterious new CEO.

The Scranton branch staff are challenged to double their sales; Andy decides to create an incentive program, but might end up regretting his promise.

After the warehouse employees win the lottery and quit their jobs, everyone in the office fantasizes about winning big; Darryl and Andy look for new warehouse workers.

When Andy decides to throw a garden party at Schrute Farms to impress Robert, Dwight researches how to be a good host; Andy's family makes him feel self-conscious.

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.

Erin tries to put on a Halloween party that will please both Andy and Robert California; Jim and Pam fight about the existence of ghosts; Dwight bonds with Robert California's son.

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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.

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.

Holly and Michael turn Andy's business seminar into an improv challenge; Erin and Gabe compete in a board game battle.

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

Jim is forced to abandon Michael at a gas station after receiving an emergency phone call; Erin, Dwight and Holly search for Michael; Pam's art inspires a captioning contest that appears to offend Gabe.

Public displays of affection between Holly and Michael make everyone uncomfortable; Jim and Pam experience the aftermath of a bottomless champagne lunch; Andy tags along on Erin's romantic treasure hunt.

After 11 years of preparation, Michael is ready to debut his action movie.

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.

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

Urkel becomes a big brother to a fourth-grader who cannot read.

Laura (Kellie Shanygne Williams) falls under a passionate spell from Steve's (Jaleel White) aphrodisiac.

Carl lands a film role when he moonlights as a movie-set security guard.

The Winslows do double takes when Steve accidentally clones himself.

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

Sheldon battles President Hagemeyer's mysterious boss over the university's science requirements; Mary discovers that Georgie is working at Meemaw's illegal gambling room.

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

Sheldon gets a dorm room all to himself; Meemaw gains an unwanted business partner.

Sheldon acts as Mary's spy during a youth lock-in at church; Georgie is attracted to an older woman.

Sheldon attends his first comic book convention; Mary tries selling makeup.

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.

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.

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.

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.

Dwight installs a device in the office that will get everyone fired if they make too many errors; Gabe takes a liking to an employee at the warehouse.

Pam teams up with Dwight to prove that Jim thinks her temporary replacement is pretty; Robert California asks to join Andy, Darryl and Kevin's band.

Andy tries to motivate the staff by taking them on a field trip to Gettysburg; Robert asks those who stay behind to come up with the company's next big idea.

Robert California brings his wife (Maura Tierney) into the office to find her a job; Dwight opens a gym in the building.

Andy tries to make holiday wishes come true; Robert decides to drown his sorrows at the office party.

Andy gets the office involved in a trivia contest; Dwight explores job opportunities at Sabre headquarters.

When Robert decides to sell his mansion, Kevin suggests he throw a pool party for the office; Erin flirts with Dwight to get Andy's attention; Robert gives a tour of his home.

When Jim returns from jury duty Dwight questions him about the case; Angela and the senator welcome their new baby.

When Dwight receives a special assignment in Tallahassee, he and Andy must decide which Scranton employees will go with him; Pam returns from maternity leave.

In Tallahassee, Fla., Dwight tries to impress Sabre's special projects president; Andy tries to avoid requests for raises.

Dwight and Packer compete for a job; Jim receives an unwelcome visitor; Andy has everyone stay late to cover for their co-workers in Florida.

Dwight tries to impress Nellie with a theatrical presentation at the Sabre store opening; Andy suffers from an embarrassing injury.

After Robert reveals his contempt for Nellie's (Catherine Tate) business plan, Jim tries to save Dwight's job; Andy discovers that Erin isn't returning to Scranton.

Steve transports himself, his clone and the Winslows to Paris, where romance blossoms for Laura; Steve is held captive by a beautiful scientist.

Steve transports himself, his clone and the Winslows to Paris, where romance blossoms for Laura; Steve is held captive by a beautiful scientist.

Carl's attempt to rescue Steve from the clutches of his kidnapper leads to a mad dash around Paris.

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

Sheldon butts heads with Dr. Lee, a new scientist in the lab; Mary is given a lotto ticket.

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

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

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

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

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.

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.

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.

Leonard decides to run against Sheldon for president of the tenants' association; Bernadette encourages Wolowitz and Koothrappali to find the owner of a drone after they find it in the backyard.

A brilliant but reclusive scientist, Doctor Wolcott, invites Sheldon to his cabin in the middle of nowhere; Penny and Bernadette improvise after Amy doesn't like the tame bachelorette party they planned for her.

Sheldon's comic book store experience changes when writer Neil Gaiman puts Stuart's store on the map; friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.

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

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

Andy drives across the country to get Erin; Nellie shows up and tries to claim the manager position.

Robert forces the office to throw a welcome party for Nellie; Erin helps Andy practice how he will break up with Jessica.

After returning from his romantic quest, Andy battles with Nellie for the manager's chair; Kelly has a difficult time choosing between Ryan and a perfect man (Sendhil Ramamurthy).

Andy crashes a fundraiser and ends up adopting 12 dogs; Dwight learns that an auction winner loses money; Nellie learns how to eat a taco.

Andy tries to jumpstart his comeback; after Robert drunkenly shuts down a local branch, Jim and Dwight join forces in hope of outsmarting a salesman.

A former boss helps Andy go undercover and stage a coup; a new opportunity arises for Robert.

Two new, young employees throw Dwight and Jim off balance; Andy returns from leadership training with a desire for revenge.

A toast at Roy's wedding leads to Pam and Jim searching their relationships for buried secrets; Dwight reacts to Nellie's mandatory charity initiative.

As Andy flaunts a discovery he made about his ancestry, Darryl struggles in his new role; Dwight teaches a language to Erin, who wants to impress her boyfriend's educated family; Jim reveals a secret.

When Jim convinces Dwight the building is unsafe, Dwight rents a bus to use as his office; Nellie asks for Andy's help; Jim uses pie to cheer Pam.

Andy invites his old a cappella group to perform for Halloween, which leads to a confrontation with his frenemy; Dwight tries to track down a madman in the office; Jim and Pam fight over his new job.

Andy must step up when his dad loses all his family's money; when Dwight is a guest on a radio show, his co-workers call in to torture him; Kevin learns a secret about Oscar.

The women of the office try to teach Dwight how to interact with female clients; Angela suspects the senator of cheating; Toby convinces some of the guys to grow mustaches.

Jay and Gloria can't agree on what kind of anniversary gifts they want to exchange; the Dunphys go with Alex to Caltech for her college tour; Mitch, Cam and Lily take a new family portrait.

Phil must make creative edits in Cam and Mitch's wedding video when footage reveals that Phil is responsible for a terrible cold that has plagued the family; Gloria and Jay try to help Manny cope with stress in different ways.

The Dunphys stay in a cramped hotel room while the house is treated for mold; Gloria feels protective when Manny starts dating an older girl; Cameron wants to maintain his team's winning streak but fears Mitchell is a jinx.

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

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

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

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

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

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

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 a play, in which she pretends to have sex with a handsome man.

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, and 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.

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.

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

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

Sheldon and Amy go crazy trying to figure out what "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.

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

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

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

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

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

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.

When Angela finds out about her husband's affair, she goes to Dwight for help; Stanley and Phyllis take advantage of Jim when he needs a favor; Pete distracts Pam as she begins painting her mural.

Dwight picks up the slack when the party planning committee fails to plan a Christmas party; Darryl worries Jim has forgotten the promise he made; Pete teaches Erin about "Die Hard.".

Pam accidentally brings lice into the office but lets Meredith take the blame; Jim spends a great day in Philadelphia with a potential business associate; Nellie, Phyllis and Kevin interfere with Darryl's love life.

Everyone abuses the office's new espresso machine; Dwight takes Clark on a sales call; Darryl goes for an interview at Jim's company; Pam surprises Jim with a visit.

Dwight tries to stop Darryl from leaving; Jim misses Cece's first recital because of work, upsetting Pam; Nellie exposes Erin and Pete.

David Wallace asks Dwight to find a new part-time salesman who will fill in for Jim; Pam looks for a new desk mate; Erin searches for her birth parents.

Nellie and Dwight spring into action when Pam needs help finding the vandal who defaced her mural; Darryl has a hard time dealing with Jim's habits.

The staff pairs off into pretend couples so they can take advantage of a Valentine's Day discount at a minimall; Erin claims she will break up with Andy when he returns, but Pete has his doubts.

During an interview for a job in Philadelphia, a manager gives Pam déjà vu; Dwight asks Angela to join him on a mission; Andy returns from his trip.

During an interview for a job in Philadelphia, a manager gives Pam déjà vu; Dwight asks Angela to join him on a mission; Andy returns from his trip.

Dwight takes a trip home for a Schrute funeral; Todd Packer tries to make up for a lifetime of bad behavior.

The office employees are excited when TV commercials for the documentary begin airing; Angela is jealous when Dwight starts dating a farmer; Jim meets with professional baseball player Ryan Howard.

The elevator goes out at the office, forcing everyone to use the stairs; Dwight forces Stanley to make a sales call; Pam and Jim talk to Nellie and Toby about relationship problems; Angela supports her man.

Dwight and Angela compete in a paper airplane contest; Andy prepares for an acting role; Jim and Pam use new skills.

Phil and Claire panic when an obnoxious couple looks at the house for sale next door; Jay learns Manny's girlfriend is the granddaughter of a business rival -- after forbidding Manny to see her; Cam and Mitch are scared of Lily's teacher (Tyne Daly).

When Claire lets Phil take charge of Halloween, he decides to do something different from her usual fright-fest theme; Jay wants to be Prince Charming for Halloween -- complete with a full head of hair; Cam becomes overwhelmed.

Phil and Claire aren't sure what to think when Haley and Andy start spending a lot of time together; Gloria hires a Spanish tutor for Manny; Cam and Mitch run into a popular journalist at a school function.

With Phil and Luke cooking Thanksgiving dinner, Claire decides to prepare a secret back-up turkey; Jay and Gloria's trip is canceled at the last minute; Lily refuses to wear a nice dress to dinner.

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

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

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

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

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

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

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 out on a date.

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

Ross becomes upset when someone at work takes his sandwich from the refrigerator and eats it; Joey finds himself in a mess when he tries to cover for Chandler and Monica's dating.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

NHL forward Wyatt Johnston and Howie Mandel set up NHL defenseman Lian Bichsel at a restaurant where a romantic proposal meltdown turns him into the unwitting villain.

Anthony Davis lures former NFL defensive lineman Gerald McCoy into a movie audition where he damages superhero memorabilia.

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

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

Past and present Dunder Mifflin employees gather for a wedding and a final round of interviews.

Past and present Dunder Mifflin employees gather for a wedding and a final round of interviews.

When a documentary crew comes to Dunder Mifflin to learn about modern management, manager Michael Scott tries to paint a happy picture of his domain, but his jokes keep falling flat.

Michael's offensive behavior prompts the company to sponsor a seminar on racial tolerance and diversity; Jim has trouble securing his biggest yearly commission.

When forced to pick a cheaper health care plan, Michael, rather than lose popularity points with his staff, shirks the responsibility to Dwight.

Michael tries to raise employee morale with a birthday party amid rumors of downsizing.

Michael and gang play the warehouse workers in a not-so-friendly game of basketball; Michael bets that the losers will have to work on Saturday.

Dwight, Michael and Jim all vie for the attention of an attractive woman who comes to the office to sell purses.

Steve feels better about having to wear a back brace after Stan admits he has worn a toupee since he was Steve's age; Roger and Francine try to sneak in an unpaid guest on their spa retreat for two.

A co-worker gives Stan pills that allow him to stay up all night after he becomes fed up with a lack of alone time.

Claire and Phil worry that Alex's boyfriend is imaginary; Manny might ruin Jay's plan to avoid attending a party; Mitch and Cam's new white couch becomes a mishap waiting to happen.

The whole family takes Haley to a bar to celebrate her 21st birthday; Phil and Jay hit a snag while trying to pick up Haley's present; Lily asks Alex, Luke and Manny where babies come from.

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

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

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

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

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

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

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

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

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

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

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

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

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

Ross competes with Chandler for the attentions of a pizza deliverywoman (Kristin Dattilo-Hayward); Joey discovers that his guest-starring role on "Law & Order" was cut while watching the show with his proud grandmother.

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

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

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

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

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

Sheldon and Amy await big news.

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

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

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

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

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

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

Still haunted by Beetlejuice, Lydia's life gets turned upside down when her daughter discovers a portal to the afterlife. When someone says Beetlejuice's name three times, the mischievous demon returns to unleash his very own brand of mayhem.

A mysterious lawman tracks three escaped convicts searching for buried treasure in the 1930s Mississippi.

Still haunted by Beetlejuice, Lydia's life gets turned upside down when her daughter discovers a portal to the afterlife. When someone says Beetlejuice's name three times, the mischievous demon returns to unleash his very own brand of mayhem.

A mysterious lawman tracks three escaped convicts searching for buried treasure in the 1930s Mississippi.

The Jokers are unsympathetic store managers, forced to throw out a disruptive customer before dealing with the wrath and disdain of fellow patrons.