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 Lawyer Guest Star Robert Maschio Todd Guest Star Matt Winston Jeffrey Guest Star Timmy Deters Boy Guest Star Jake Fritz Billy Guest Star Mary Gillis Mrs. Pratt Guest Star Michael Hobert Pizza Guy Guest Star Lynne MacLean Nurse Kearney Guest Star Ted Rogers Mr. Burski Guest Star Shannon Welles Old Woman Guest Star Aloma Wright Nurse Roberts Guest Star Bill Lawrence Executive Producer, Writer Adam Bernstein Director