Zach Braff Dr. John "J.D." Dorian Actor, Director 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 Heather Graham Dr. Molly Clock Guest Star Josh Randall Jake Guest Star Christa Miller Jordan Guest Star Phill Lewis Hooch Guest Star Sam Lloyd Ted Guest Star Johnny Kastl Doug Guest Star Chrystee Pharris Kylie Guest Star Robert Maschio Todd Guest Star Aloma Wright Nurse Roberts Guest Star Amy Rilling Nurse Guest Star Frank Cameron Dr. Mickhead Guest Star Michael Hobert Lonnie Guest Star Martin Klebba Randall Guest Star Bill Lawrence Executive Producer, Writer Ken Whittingham Director Chris Koch Director John Inwood Director Craig Zisk Director Gail Mancuso Director Victor Nelli Jr. Director Tad Quill Writer Angela Nissel Writer Debra Fordham Writer Janae Bakken Writer Mark Stegemann Writer Gabrielle Allan Writer Bill Callahan Writer Tim Hobert Writer Mike Schwartz Writer Neil Goldman Writer Eric Weinberg Writer