The episode is called The One with All the Thanksgivings from season 5.
Monica and Chandler get married at the very end of season seven.
Chandler proposed to Monica in Episode 25, Season 6: "The One with the Proposal, Part 2"
Season 7, Episode 23, The One with Chandler and Monica's Wedding. Ross has the "older brother" chat with Chandler and threatens to beat him up if Chandler makes Monica unhappy.
Monica and Rachel's largest fight was in The One On The Last Night (Season Six).
'the stain" the one where chandler and monica gets a maid
Monica and Chandler get married at the very end of season seven.
Chandler proposed to Monica in Episode 25, Season 6: "The One with the Proposal, Part 2"
Season 7, Episode 23, The One with Chandler and Monica's Wedding. Ross has the "older brother" chat with Chandler and threatens to beat him up if Chandler makes Monica unhappy.
Monica and Rachel's largest fight was in The One On The Last Night (Season Six).
'the stain" the one where chandler and monica gets a maid
Monica and Chandler get engaged at the end of Season 6 and get married at the end of Season 7.
This is in Season 10, Episode 11, The One Where the Stripper Cries. Ross and Chandler go their college reunion and have a flashback to 1 night where there was a party and Monica and Rachel visited them.
[Scene: Central Perk, Chandler, Joey, Phoebe, and Monica are there.]Monica: There's nothing to tell! He's just some guy I work with!
Monica and Richard are a couple in season 2 of Friends
In season 5 the episode is called the one where everybody finds out :)
Season 7, Episode 2, The One With Rachel's Book. Monica and Chandler just got engaged and have started talking about wedding preparations, using Monica's very detailed book that she's had since childhood with information about the perfect wedding.
During the Season 8 finale of Friends, Monica marries her friend Chandler. Later during Season 10, they adopt fraternal twins, a boy and a girl.