The Warden was the warden of the prison holding Clarence in the Season 2 episode Acceptance. He was portrayed by actor Marshall Bell.
After Clarence gets ill, the Warden calls Princeton-Plainsboro Teaching Hospital for assistance and Gregory House convinces Lisa Cuddy to send him.
Once House arrives, he realizes Clarence has to go to the hospital, but the Warden refuses to release a death row prisoner. House convinces Stacy Warner to obtain a court order releasing Clarence to his custody.