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 Tara Reid Danni Guest Star Scott Foley Sean Kelly Guest Star Bellamy Young Dr. Miller Guest Star Charles Rahi Chun Dr. Wen Guest Star Freddy Rodríguez Mark Guest Star Robert Maschio Todd Guest Star Sam Lloyd Ted Guest Star Christa Miller Jordan Sullivan Guest Star Johnny Kastl Doug Guest Star Aloma Wright Nurse Roberts Guest Star Frank Cameron Dr. Mickhead Guest Star Jason Baumgard Chet Guest Star Martin Klebba Randall Guest Star Bill Lawrence Executive Producer, Director, Writer Michael Alan Spiller Director Chris Koch Director Craig Zisk Director Adam Bernstein Director Ken Whittingham Director Gail Mancuso Director Marc Buckland Director John Inwood Director Tim Hobert Writer Neil Goldman Writer Eric Weinberg Writer Debra Fordham Writer Janae Bakken Writer Mark Stegemann Writer Gabrielle Allan Writer Mike Schwartz Writer Garrett Donovan Writer