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 Kathryn Joosten Mrs. Tanner Guest Star Travis Webster David Morrison Guest Star Charles Rahi Chun Dr. Wen Guest Star Lela Lee Surgical Intern Guest Star Esther Mercado Mrs. Guerrero Guest Star Liliana Mumy Samantha Tanner Guest Star Jennifer Naimo Gina Tanner Guest Star Mike Schwartz Delivery Man Guest Star Jack Thomas Jim Morrison Guest Star Cooper Thornton Tommy Tanner Guest Star Randall Keenan Winston Death Guest Star Bill Lawrence Executive Producer Marc Buckland Director Matt Tarses Writer