"The One Where Ross Got High," Friends
Friends' Thanksgiving episodes are classics (Underdog got away, the Geller Cup football game, Chandler in a box, Brad Pitt hates Jennifer Aniston), but this one takes the trifle — and the reason is threefold: Phoebe crushes on Jack Geller and Jacques Cousteau; Rachel makes a trifle with beef ("It tastes like feet"); and everyone learns it was Ross, not Chandler, who smoked pot in college, among other revelations, like his and Rachel's Vegas wedding. But, you know, he got tricked into all those things.