Zach Braff Dr. John "J.D." Dorian Actor, Director 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 Elizabeth Banks Dr. Kim Briggs Guest Star Robert Maschio Todd Guest Star Sam Lloyd Ted Guest Star Christa Miller Jordan Guest Star Eliza Coupe Denise Guest Star Lee Thompson Young Derek Guest Star Kate Micucci Stephanie Guest Star Kit Pongetti Lady Guest Star John Kahle Ethan Guest Star Nancy Daly Mrs. Gallin Guest Star Taran Killam Jimmy Guest Star Marielle Jaffe Sexy Nurse Guest Star Stephanie Siemiller Mrs. Henderson Guest Star Bill Lawrence Executive Producer Neil Goldman Writer Garrett Donovan Writer