House M.D. Doctors:
Dr. Chris Taub
Dr. Lawrence Kutner (Deceased)
Dr. Allison Cameron (former)
Dr. Martha M. Masters (new)
Dr. Amber "Bitch" Volakis (Deceased)
Dr. Jeffrey Cole (former)
Dr. Travis Brennan (former)
Dr. Henry "Bosley" Dobson (former)
Henry Dobson (Bosley): Bosley is fired by Dr. House.
Travis Brennan: Brennan is fired because he was found poisoning a patient, Brennan was arrested.
Amber Volakis: Amber is fired by House. But later dies in Wilson's arms because she was sick.
Lawrence Kutner: Kutner kills himself with his gun. Thirteen and Foreman find him dead in his apartment.
Allison Cameron: Cameron quits being a doctor.
Jeffery Cole: When he and Kutner become friends he is fired for questioning Cuddy's authority.
note: the rest of the doctors are still in the show " House has been sad since Kutner killed himself.