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 Heather Graham Dr. Molly Clock Guest Star Christa Miller Jordan Guest Star Big Bank Hank Himself Guest Star Michael Wright Himself Guest Star Michael Alaimo Mr. Radford Guest Star Jordi Caballero Italian Guy Guest Star Cynthia Frost Mrs. Grodberg Guest Star Marshall Manesh Akbar Guest Star Harriett S. Miller Elderly Woman Guest Star Mike Schwartz Patient Guest Star Bart Sumner Mr. Blass Guest Star Bill Lawrence Executive Producer, Director Eric Weinberg Writer