As Halloween is approaching, J.D. is nervous, because his older brother Dan is coming to visit. J.D. is annoyed how Dan pretends to be a doctor, and how he sees Dan hitting on his friend, and ex-girlfriend, Elliot Reid. J.D. soon comes to realize that the problems he is facing with Dan are because he is ashamed to be Dan's brother. In the end, J.D. and Turk go to the bar for a Halloween party, dressed as pigs. J.D. says in his narraration, that sometimes, people need to act like a child. It is also revealed, that the gorilla who was annoying J.D., was the chief of medicine, Dr. Kelso.