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 Elizabeth Bogush Alex Guest Star Jimmie Walker Jimmie Walker Guest Star Robert Maschio Todd Guest Star Christa Miller Jordan Sullivan Guest Star Michael McDonald Mike Davis Guest Star Charles Rahi Chun Dr. Wen Guest Star Matt Winston Jeffrey Guest Star Johnny Kastl Doug Guest Star Cody Estes Young J.D. Guest Star P.D. Mani Dr. Simotas Guest Star Derek Miller Orderly Guest Star Aloma Wright Nurse Roberts Guest Star Bill Lawrence Executive Producer, Writer Marc Buckland Director Lawrence Trilling Director Michael Alan Spiller Director Eric Weinberg Writer Matthew Diamond Director Elodie Keene Director Will Mackenzie Director Peter Lauer Director Craig Zisk Director Adam Bernstein Director Gabrielle Allan Writer Garrett Donovan Writer Matt Tarses Writer Mike Schwartz Writer Mark Stegemann Writer Debra Fordham Writer Janae Bakken Writer Neil Goldman Writer