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 Travis Schuldt Keith Guest Star Michael Weston Private Brian Dancer Guest Star Julian Berlin Anne Guest Star Robert Maschio Todd Guest Star Aloma Wright Nurse Roberts Guest Star Rachel Avery Katie Guest Star Aaron Ikeda Rex Guest Star Christina Miles Gloria Guest Star Mike Schwartz Lloyd Guest Star Randall Keenan Winston Leonard Guest Star Delandis Dancer at Maxie's Guest Star Danielle Reierson Jenny Guest Star Bill Lawrence Executive Producer Ken Whittingham Director Aseem Batra Writer