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 Sam Lloyd Ted Guest Star Christa Miller Jordan Guest Star Peter Holden Mr. Macrae Guest Star Jerry Sherman Mr. Mandelbaum Guest Star Duke Stroud Board Member Guest Star Alison White Butch Doctor Guest Star Tyler Poelle Boon Guest Star Bill Lawrence Executive Producer Rick Blue Director Aseem Batra Writer