Ross's lesbian ex-wife, Carol, is pregnant with his child, and he doesn't like her choice of last name for the baby. Rachel finds out that her ex-fiancé went on what would have been their honeymoon with her maid of honor.

Monica and Ross mourn the death of their grandmother with a little help from the gang, and Monica and her mom come to an unspoken understanding about the relationship between mothers and daughters. Meanwhile, Chandler is irritated by office speculation that he is gay.

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.

After having a fight with Chandler, Joey decides to move out. Rachel and Phoebe decide to get tattoos. And, on his birthday, Mr. Geller receives the unsettling news that his best friend and his daughter are dating.

Ross reveals a fantasy to Rachel involving a certain "Star Wars" character. Monica suffers from insomnia after her breakup with Richard. And Chandler, back together with Janice, wants Joey to bond with her.

Monica caters a party for her mother, who still doesn't quite know how to talk to her daughter. Chandler's encounter with Rachel's boss leads to an embarrassing situation. And an encyclopedia salesman takes advantage of Joey.

The gang heads over to London for Ross and Emily's wedding. Joey can't contain his excitement about London which annoys Chandler to no end and results in two of them arguing. While the guys are touring the city, Monica, together with Ross and Emily, visit the chapel where the wedding ceremony is supposed to take place only to find out that it's being torn down prematurely.

Phoebe tries to warn the gang that Rachel is coming to London to tell Ross that she still loves him. After the initial excitement about visiting England dissipates, Joey begins to feel homesick, however, one of the bridesmaids helps him to forget about it. Meanwhile, Ross and Emily's parents get into an argument over the bill for the wedding.

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.

Although the Thanksgiving meal is great, Chandler is still moody over his parent's divorce during the holiday when he was a boy and Ross is depressed about his second divorce. The group reminisces about their worst Thanksgivings in order to cheer them up, and Monica's worst memory is revealed.

It's Thanksgiving and Monica's parents are coming to visit, which is a problem because, not only they do not like Chandler, they also don't know that he and Monica are living together. Rachel is tasked with making a Thanksgiving dessert, but she does so with mixed results. Meanwhile, Joey and Ross are eager to finish the dinner and leave, because they want to go to a Thanksgiving party with Janine and her dancer friends.

As Monica starts planning her wedding she's shocked to find out that her parents have spent her entire wedding fund. However, her spirits are restored when she discovers that Chandler has enough savings for her dream wedding scenario. Phoebe temporarily moves into Ross's apartment, bringing her massage clients with her. This leads to some weird encounters for Ross. Meanwhile, Joey mocks Rachel when he finds an erotic novel she is reading.

Monica tries to figure out Phoebe's grandmother's secret chocolate chip cookie recipe. Meanwhile, Rachel tries to teach Joey how to sail, and Chandler has an awkward encounter when he tries to bond with Monica's father.

When Rachel turns 30, the gang reminisces about their 30th birthdays. Ross buys a sports car to look cool, Monica gets drunk, and Phoebe, while trying to patch things up with Ursula, discovers that she is actually 31.

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.

The excitement of Monica and Chandler's wedding is diminished by the news that someone may be pregnant. Chandler's hopes of not embarrassing Monica on the dance floor are ruined by his slippery new shoes, and Ross' attempts to flirt with an attractive wedding guest.

Everybody prepares to go out to Long Island for the elder Gellers' 35th wedding anniversary party. Monica struggles to prepare the perfect toast that would make everybody cry. Meanwhile, Ross and Rachel discover that his parents have told people they're married and they decide to just go along with it for the night. However, Rachel gets carried away a little telling stories about their "wedding" that didn't happen. Also, Phoebe invites her new boyfriend, Parker, who is extremely enthusiastic.

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.

The friends are looking forward to getting together and celebrating Phoebe's birthday. However, on the day of the party, Ross struggles to convince Rachel to leave Emma with Mrs. Geller babysitting, and Monica and Chandler get into an argument, after Monica discovers that he's been smoking. All of this causes them to be incredibly late, leaving Phoebe and Joey alone at a restaurant with a table for six.

On Emma's first birthday, Rachel convinces Monica and Chandler to delay their long-anticipated trip to Vermont to stay for the party. But complications ensue when the infant falls asleep--and a racy, adult birthday cake arrives. Meanwhile, when Ross dashes out to help Rachel, he leaves Joey in charge of keeping everybody locked in the apartment until they return with the right cake.