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 Brendan Fraser Ben Guest Star Ned Bellamy Dr. Green Guest Star Sam Lloyd Ted Guest Star Christa Miller Jordan Guest Star Aloma Wright Nurse Roberts Guest Star Frank Cameron Dr. Mickhead Guest Star Richard Clarke Larsen Homeless Man Guest Star Warren Munson Mr. Taylor Guest Star Randall Keenan Winston Leonard Guest Star Bill Lawrence Executive Producer Chris Koch Director Garrett Donovan Writer Neil Goldman Writer