Season 8: Episode 170: The One After "I Do"
In the season premiere, the reception following Monica and Chandler's wedding is almost upstaged by the news flash that someone might be pregnant -- and when Phoebe thinks it's Rachel, she quickly comes up with a plan to cover for her friend. Elsewhere at the party: Ross tries to impress a pretty single woman (guest star Bonnie Somerville); Chandler has troubles on the dance floor; and Joey hopes to impress Chandler's mom's (guest star Morgan Fairchild) date (guest star Jim Piddock) -- an important Broadway producer -- with his acting ability.