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 Christa Miller Jordan Sullivan Guest Star Jay Mohr Dr. Peter Fisher Guest Star Jay Leno Jay Leno Guest Star Barry Kivel Mr. Hilliard Guest Star Robert Maschio Todd Guest Star Aloma Wright Nurse Roberts Guest Star Jason Baumgard Chet Guest Star Robb McKindles Angry Golfer Guest Star Masi Oka Franklyn Guest Star Kathryn White Mrs. Grayson Guest Star D. Elliot Woods Security Guard Guest Star Dave Martel Patient Guest Star Hayden Tank Boy Guest Star Bill Lawrence Executive Producer Marc Buckland Director Mark Stegemann Writer Angela Nissel Writer