Zach Braff Dr. John "J.D." Dorian Actor Donald Faison Dr. Chris Turk Actor John C. McGinley Dr. Perry Cox Actor Eliza Coupe Dr. Denise Mahoney Actor Kerry Bishé Lucy Bennett Actor Michael Mosley Drew Suffin Actor Dave Franco Cole Aaronson Actor Reno Wilson Russell Vaughn Guest Star Ken Jenkins Dr. Bob Kelso Guest Star Robert Maschio Todd Guest Star Nicky Whelan Maya Guest Star Judy Kain Irene Kelly Guest Star Matthew Moy Trang Guest Star Cyrah Hawkins Orderly Guest Star Bill Lawrence Executive Producer Corey Nickerson Writer Kevin Etten Writer Peter Lauer Director