Zach Braff Dr. John "J.D." Dorian Actor Sarah Chalke Dr. Elliott Reid Actor Donald Faison Dr. Chris Turk Actor John C. McGinley Dr. Perry Cox Actor Judy Reyes Nurse Carla Espinosa Actor Ken Jenkins Dr. Bob Kelso Actor Neil Flynn The Janitor Actor Tara Reid Danni Guest Star Freddy Rodríguez Mark Guest Star Johnny Kastl Doug Guest Star Robert Maschio Todd Guest Star Christa Miller Jordan Guest Star Christopher R.C. Bosen Danny Guest Star Bill Lawrence Executive Producer Gail Mancuso Director Debra Fordham Writer