Dr. Chase's first name was Robert in House M.D.
Robert Chase is an Australian surgeon who begins the series as one of House's original diagnostic fellows at Princeton-Plainsboro Teaching Hospital. Jesse Spencer played the character throughout the series, and Chase remained connected to the diagnostic department even as his professional responsibilities changed.
Chase's background and specialty distinguish him from the other original fellows. Allison Cameron is an immunologist, while Eric Foreman is a neurologist. Chase's surgical training gives the team a different perspective on procedures, anatomy, and the practical treatment of conditions uncovered during diagnosis.
The character is often called simply “Chase,” which can make his first name easy to overlook. He is not James Wilson, House's oncologist friend, and he is not Robert Sean Leonard, the actor who played Wilson. Robert Chase's first name is also unrelated to Jesse Spencer's real first name.