‘My Common Enemy’
Season 4, Episode 7 - Aired October 19, 2004
J.D. doesn't feel anything when Elliot starts seeing his brother Dan (Tom Cavanagh). Turk uses his newly-diagnosed diabetes to get Carla to bring him food. Meanwhile, Dr. Cox and Dr. Kelso team up to break the spirit of the ever cheerful Dr. Molly Clock (Heather Graham).
Quote from Dr. Kelso
Dr. Kelso: [v.o.] Others can be torn apart by the loss of a common enemy.
Dr. Cox: I hate you, Bob.
Dr. Kelso: Same times a thousand, big guy.
Quote from Dan
J.D.: I can't believe you two never broke up. Dan was in my tub for four hours, drinking beers and singing "She's Gone."
Dan: How do you take a bath? Okay, I'm gonna get dressed. Hey, Elliot, do you mind if I borrow one of your socks? I seem to have lost my righty in the fray. Oh, there you are, high-flyer.