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 Bonita Friedericy Nurse Guest Star Sam Lloyd Ted Guest Star Christa Miller Jordan Sullivan Guest Star Marcus Ashley ER Doctor Guest Star Richard Cansino Dr. Rose Guest Star Philip McNiven Roy Guest Star George Miserlis Crispin Guest Star Paul F. Perry Randall Guest Star Amy Tolsky Bespectacled Nurse Guest Star James M. Connor Reporter Guest Star Bill Lawrence Executive Producer Craig Zisk Director Eric Weinberg Writer