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 Christa Miller Jordan Sullivan Guest Star Aloma Wright Nurse Roberts Guest Star Sam Lloyd Ted Guest Star Robert Maschio Todd Guest Star Travis Schuldt Keith Guest Star Shaughn Buchholz Jason Guest Star James Carraway Patient Guest Star Joe Costanza Mr. Kellerman Guest Star Keli Daniels Nurse Guest Star Josh Hammond Razor Guest Star Tom Schmid Fellowship Director Guest Star Opender Singh Omar Guest Star Joe Souza Guy Guest Star James Grabowski Box Office Attendant Guest Star Aaron Ikeda Rex Guest Star Jordan Zucker Lisa Guest Star Bill Lawrence Executive Producer, Director, Writer