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 Aloma Wright Nurse Roberts Guest Star Robert Maschio Todd Guest Star Eliza Coupe Denise Guest Star Betsy Beutler Katie Guest Star Todd Bosley Howie Guest Star Sonal Shah Sunny Guest Star Julie Pop Lulu Tarasi Guest Star Amanda Thorp Brianna Tarasi Guest Star Taran Killam Jimmy Guest Star Scott Palmason Dr. Kelso Intern Guest Star Geoff Stevenson Dr. Beardface Guest Star Daniel Saltos Dr. Wen Intern Guest Star Sydney Jay Ross Guest Star Bill Lawrence Executive Producer Devin Mahoney Writer Rego Marquiis Writer Ted Wass Director