Hugh Laurie Dr. Gregory House Actor Lisa Edelstein Dr. Lisa Cuddy Actor Omar Epps Dr. Eric Foreman Actor Robert Sean Leonard Dr. James Wilson Actor Jennifer Morrison Dr. Allison Cameron Actor Jesse Spencer Dr. Robert Chase Actor David Morse Michael Tritter Guest Star Tory Kittles Derek Hoyt Guest Star Meagan Good Amy Guest Star Jason George Brock Hoyt Guest Star Kadeem Hardison Lawyer Howard Gemeiner Guest Star Brian Leckner Ivan , Voldemort Guest Star Helen Carey Judge Helen Davis Guest Star Vyto Ruginis Asst. Dist. Attorney Velez Guest Star Aulani Rhea Nurse Guest Star Martin Mullen Ennis Guest Star Zach Lewis Firefighter Guest Star Donald Sage Mackay Neil Guest Star Terryn Westbrook Sara Guest Star Hira Ambrosino Dr. Chen Guest Star Bobbin Bergstrom Nurse Guest Star Paul Attanasio Executive Producer Katie Jacobs Executive Producer David Shore Executive Producer Bryan Singer Executive Producer Daniel Sackheim Director Leonard Dick Writer