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 Charles Rahi Chun Dr. Wen Guest Star Robert Maschio Todd Guest Star Mike Weinberg Tyler Guest Star Aloma Wright Nurse Roberts Guest Star Colin Bain Steve Guest Star Randy Crowder Patient Guest Star Reggie Currelley Man Guest Star Frank Cameron Dr. Mickhead Guest Star Kareem Ferguson Waiter Guest Star Shanola Hampton Woman Guest Star Libby Hudson Lydecker Hot Grandma Guest Star Matt Kaminsky Mr. Milligan Guest Star Kattia Ortiz Nurse Guest Star Linda Porter Old Woman Guest Star Wells Rosales Student Guest Star Geoff Stevenson Dr. Beard Face Guest Star Adam Zolotin Reuben Guest Star Bill Lawrence Executive Producer Chris Koch Director Angela Nissel Writer