Erica goes into labor and the new parents, Monica and Chandler, get a bit more than they bargained for. Meanwhile, Joey gets them a housewarming gift - Chick Jr. and Duck Jr., who unfortunately get trapped inside the foosball table. Also, after their night together, Ross realizes that he's still in love with Rachel and doesn't want her to leave. Other friends convince him to go after her and Phoebe races Ross to the airport in a bid to stop Rachel from leaving for Paris. The six friends prepare to say goodbye and embark on the next chapters of their lives.

After getting his big break, with Days of Our Lives, Joey pays Chandler back. Monica is unemployed and hard up for money. Monica and Rachel's prom video reveals Monica's former girth, Rachel's former nose and the way Ross has always felt about Rachel.

Monica and Chandler return from their honeymoon with stories of a couple that they met on the flight back, but soon discover that the couple gave them a wrong number. Meanwhile, Ross and Rachel tell everyone about the night they were together, however, their stories differ as to who made the first move. While Ross emphatically defends his side of the story, he accidentally reveals that he has the encounter on videotape. Unsurprisingly, everyone wants to see it.

When the friends discover that Ugly Naked Guy is moving out of his apartment, Ross leaps at the opportunity to get his own place again. Phoebe finds out about Monica and Chandler's relationship, and tries to get them to reveal the truth by seducing Chandler.

Speculation regarding the father of Rachel's baby leads to a misunderstanding when Joey discovers a red sweater left behind in a one-night stand Rachel had. Meanwhile, Chandler and Ross search for the disposable cameras left behind at the wedding and Monica goes on a present-opening binge.

A drunken Rachel is persuaded to call Ross and reveal her feelings for him on his answering machine. Now, Ross must make a decision between her and Julie. Meanwhile, Monica finds work as Chandler's personal trainer and Phoebe has a hard time trying to get her boyfriend to have sex with her.

Monica decides to hold a surprise birthday for Rachel, but everything goes wrong when Rachel's estranged parents turn up unexpectedly. The party then splits into two factions, but complications inevitably ensue.

Phoebe's uterus is examined for implantation of the embryos. Meanwhile, a seemingly harmless game between Chandler and Joey against Monica and Rachel escalates into a full blown contest where the stakes are raised higher and higher.

Joey is a celebrity contestant on "The $100,000 Pyramid," with its actual host, Donny Osmond. Meanwhile, Phoebe's bachelorette party features a rather unexpected surprise when the stripper shows up. Also, Chandler and Ross attend a college reunion and flash back to 1987 to reflect on a pact they made when they were in college.

Chandler agrees to spend Thanksgiving in a shipping crate as penance for kissing Kathy. The gang decides to give each other Secret Santa gifts. After Monica gets ice in her eye, she ends up visiting Richard's son, who is as attracted to Monica as his father was.

With the New Year, the friends make New Year's resolutions. Ross resolves to try a new thing every day. Chandler resolves to not make fun of his friends for a week. Joey resolves to learn how to play the guitar, with Phoebe as his teacher. Rachel resolves to give up gossiping. Chandler nearly goes insane holding it all in. Ross is stuck in a sticky situation at his date's apartment, in constricting and hot leather pants. Rachel discovers a big secret (Monica and Chandler) that threatens to spoil her resolution.

So close to the wedding, Chandler suddenly realizes the overwhelming meaning of getting married and takes off without warning anyone. Meanwhile, Joey acts opposite a famous actor in a movie, but can't bring himself to tell him that he spits when he says his lines. Phoebe and Ross try to find Chandler before the wedding starts, while Rachel tries to hinder Monica, so that she doesn't find out the shocking news. On the day of the wedding Joey encounters a scheduling problem, while Phoebe and Rachel come across a surprising discovery.

Monica invites Will, an old high school friend of her and Ross over for a Thanksgiving dinner, unaware that he isn't too fond of Rachel. Meanwhile, Joey vows to eat an entire turkey by himself, and Chandler and Phoebe pretend to watch a football game in order to avoid helping in the kitchen.

Ross and Rachel go to the hospital to have their baby, but it's a long labor. They get stuck in a semi-private room, and many other couples come and go before Rachel is ready to deliver - the last couple being Janice and her new husband. Meanwhile, Chandler and Monica decide to start trying to have a baby, but can't find an empty hospital room where they wouldn't be disturbed. Also, Phoebe meets a handsome stranger and "recruits" Dr. Drake Ramoray to gather some personal information about him. After Rachel gives birth to her little baby girl, she must confront relationship issues around her. So does Ross, who gets an engagement ring from his mother, while she urges him to propose to Rachel. The things, however, take an interesting turn.

Joey, Ross, Rachel and Phoebe convince Monica and Chandler to host a Thanksgiving dinner, however the four of them end up arriving an hour late as the boys decide to go to Rangers game, while the girls take Emma to a baby beauty pageant. This enrages Monica and she refuses to let the famished guests into her and Chandler's apartment which causes even bigger problems.

As the big day approaches, Phoebe's wedding planner, Monica, makes everyone around her crazy because according to her - every little thing needs to happen around schedule. This doesn't sit well with Phoebe and she fires her. Unfortunately, on the wedding day New York is hit with the worst snowstorm its seen in 20 years, forcing plans to change. As a substitute for Phoebe's incarcerated father, Joey takes his role much too seriously. Meanwhile, Chandler and Ross discover that neither of them has a part in the wedding; however, after one of Mike's groomsmen is unable to attend, they compete for the open position by any means necessary.

Extremely pregnant Erica visits Monica and Chandler just as they are preparing to move to their new house in the suburbs. At the same time Rachel has packed and ready for her move to Paris, so on her last night in New York the gang hosts a farewell party for her. She says goodbye to each of her friends individually, except for Ross and he's offended. However, before the night is over, there will be more surprises.

Joey buys a big screen TV and two leather recliners with his newfound money. Monica has a catering job for one of her parents' friends and becomes infatuated. Ross and Rachel attempt to have their first real date, but Rachel laughs every time they kiss. When they try again the next evening, they are interrupted when Ross is called into the museum.

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

Ross chooses between Rachel and his bald-headed girlfriend Bonnie. Phoebe struggles to deal with the revelation that her mother's friend is actually her mother. Monica gets stung by a jellyfish, forcing Chandler and Joey to step up to the plate in order to relieve her pain.

Ross proposes to Emily. Monica and Rachel try to win their apartment back from Chandler and Joey.

In the aftermath of his Freudian slip, Ross tries to rescue his marriage with Emily. Meanwhile, Chandler and Monica try and find a moment alone in order to continue their affair while overseas.

Ross continues to try and mend his marriage to Emily. When Chandler accidentally kisses Monica in front of everyone before leaving for work, he tries to recover by kissing Rachel and Phoebe as well. Meanwhile, Phoebe starts getting irritated by everyone's London stories.

Joey starts to get uncomfortable with protecting Monica and Chandler's secret, especially when it places him in embarrassing situations with the rest of the group. Meanwhile, Ross becomes enraged at work when someone swipes his turkey sandwich. Phoebe and Rachel enroll in a literature class.

Joey tries to earn some extra money by entering a medical study, however, there's a slight problem: the study is for identical twins. Rachel and Phoebe take self-defense classes, but Ross attempts to give them a lesson in Unagi instead. Meanwhile, Chandler and Monica agree to give each other homemade presents for Valentine's Day.