Three doctors formed House's original diagnostic team in the first season of House M.D.
The team consisted of Robert Chase, Allison Cameron, and Eric Foreman. They worked under House at Princeton-Plainsboro, investigating unusual cases and performing the tests, procedures, and research needed to challenge his diagnoses.
Each doctor brought a different perspective. Chase was an Australian intensive-care specialist with a pragmatic approach, Cameron was an immunologist known for empathy, and Foreman was a neurologist with a skeptical attitude toward House's methods. Their contrasting personalities created much of the show's early team dynamic.
Later seasons changed the composition of House's department, adding doctors such as Remy “Thirteen” Hadley, Chris Taub, and Lawrence Kutner. Those later additions are why viewers may remember a larger team, but the original first-season diagnostic group contained three doctors.