Scrubs - Season 3 Episode 18 -

JD dresses like a clown to fill into Elliot's shoes. Dr. Cox tries to have the hot Dr. Miller on his side in the war with Kelso. It's Turk's turn to take the narration -since JD is a clown and has nothing to say- and he is afraid of sending the invitations that mean that his wedding is finalized and there is no going back. But Carla makes him know that she is the right person to be with.