In House M.D., James Wilson is the hospital’s oncologist and chief of oncology.
Wilson works at Princeton-Plainsboro and is played by Robert Sean Leonard. His specialty focuses on cancer, making him an important consultant when patients have suspected or confirmed malignancies. The role also gives the series a recurring perspective on difficult treatment decisions and end-of-life care.
Wilson’s professional identity is closely connected to his friendship with Gregory House. House often seeks Wilson’s opinion even when the case is outside oncology, while Wilson is one of the few people willing to confront House directly. Their contrasting personalities drive many of the show’s personal storylines.
The character is sometimes confused with Foreman or Chase because all three are senior doctors associated with House’s diagnostic department. Unlike them, Wilson is not a member of House’s diagnostic team; he leads oncology and frequently acts as a consultant.