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 Mitchell Emery Actor Mike Schwartz Lloyd Actor Aseem Batra Josephine Actor Ed Marques Patient Actor Tyler Poelle Boon Actor Gene Pompa Paulo Actor Bill Lawrence Executive Producer Linda Mendoza Director Clarence Livingston Writer