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 Christa Miller Jordan Sullivan Guest Star Michael Learned Guest Star Aloma Wright Nurse Roberts Guest Star Johnny Kastl Doug Guest Star Sam Lloyd Ted Guest Star Robert Maschio Todd Guest Star Travis Schuldt Keith Guest Star Shaughn Buchholz Jason Guest Star Michael Hobert Lonnie Guest Star Frank Cameron Dr. Mickhead Guest Star Christina Miles Gloria Guest Star Aaron Ikeda Rex Guest Star Jordan Zucker Lisa Guest Star Bill Lawrence Executive Producer, Director, Writer John Inwood Director Michael Alan Spiller Director Linda Mendoza Director Victor Nelli Jr. Director Kevin Biegel Writer Tad Quill Writer Debra Fordham Writer Janae Bakken Writer Aseem Batra Writer Mark Stegemann Writer Tim Hobert Writer Bill Callahan Writer Garrett Donovan Writer Mike Schwartz Writer Eric Weinberg Writer Eren Celeboglu Writer Neil Goldman Writer