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 Scott Foley Sean Guest Star Robert Maschio Todd Guest Star Fred Stoller Mr. Hoffner Guest Star Aloma Wright Nurse Roberts Guest Star Charles Rahi Chun Dr. Wen Guest Star Johnny Kastl Doug Guest Star Katie O'Rourke Coffee Nurse Guest Star Paige Peterson Shelly Guest Star Helen Siff Female Patient Guest Star Charles C. Stevenson Jr. Patient Guest Star Richard Wells Patient 2 Guest Star Andy B Dardaine Patient 1 Guest Star Bill Lawrence Executive Producer Adam Bernstein Director Eric Weinberg Writer