Friends is famous for it's Thanksgiving episodes, with every season (apart from season 2) including a Thanksgiving episode. I love all of the Thanksgiving episodes, especially The One With the Rumour.
Brad Pitt guest stars in this episode as Monica's former fat friend, Will. It is revealed that Will used to hate Rachel Green (played by his then wife Jennifer Aniston). After dinner a lot of home truths get told, including the fact that Will and Ross started a club, the "I hate Rachel" club, and that Ross made out with the 50 year old librarian. The storylines are fantastic and sooo funny, in particular Pheobe's reactions to Will (including looking up and congratulating the heavens for Will when she sees him).
This episode is perfect!!!! One of the best friends episodes ever!!!!