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 Michael J. Fox Kevin Guest Star Charles Rahi Chun Dr. Wen Guest Star Johnny Kastl Doug Guest Star Sam Lloyd Ted Guest Star Robert Maschio Todd Guest Star Christa Miller Jordan Guest Star Aloma Wright Nurse Roberts Guest Star Frank Cameron Dr. Mickhead Guest Star Martin Klebba Randall Guest Star John Maynard Random Doctor Guest Star Bill Lawrence Executive Producer, Writer Michael Alan Spiller Director