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 Sam Lloyd Ted Guest Star Christa Miller Jordan Guest Star Andrew Miller Baby Jack Guest Star Aziz Ansari Ed Guest Star Kate Micucci Stephanie Guest Star Blair Williamson Craig Guest Star George Miserlis Crispin Guest Star Paul Perry Randall Guest Star Philip McNiven Roy Guest Star Bradley Charles Etheridge Medical Intern Guest Star Bill Lawrence Executive Producer Debra Fordham Writer Mark Stegemann Director