S3, E15: House treats a talented 35-year-old pianist with the mental age of a 4-year-old, and the team worry about the state of House's own health when they make an alarming discovery.
Dave Matthews
Kurtwood Smith
Dru Mouser
Scott Weintraub
Tyler Patton
Kendra Cover
Ingrid Sanai Buron
Bobbin Bergstrom