Zach Braff Dr. John "J.D." Dorian Actor Donald Faison Dr. Chris Turk Actor John C. McGinley Dr. Perry Cox Actor Eliza Coupe Dr. Denise Mahoney Actor Kerry Bishé Lucy Bennett Actor Michael Mosley Drew Suffin Actor Dave Franco Cole Aaronson Actor Ken Jenkins Dr. Bob Kelso Guest Star Robert Maschio Todd Guest Star Nicky Whelan Maya Guest Star Windell Middlebrooks Captain Duncook Guest Star Steven Cragg Lt. Underhill Guest Star John Billingsley Alan Guest Star Antonio Sabato Jr. Antonio Sabato Jr. Guest Star Jim Tasker Announcer Guest Star Anya Engel-Adams Car Wash Intern Guest Star Gina Fricchione Cole's Mom Guest Star Paul Lindsay Amir Guest Star Bill Lawrence Executive Producer Josh Bycel Writer Jonathan Groff Writer Michael McDonald Director