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 Sarah Lancaster Lisa Guest Star Robert Maschio Todd Guest Star Aloma Wright Nurse Roberts Guest Star Marcy Goldman Mrs. Watson Guest Star Damara Reilly Mrs. Koppleman Guest Star Brogan Roche Choir Leader Guest Star Bill Lawrence Executive Producer Gail Mancuso Director Angela Nissel Writer