The BEST seasons of Louis Theroux: By Reason of Insanity

Every season of Louis Theroux: By Reason of Insanity ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Louis Theroux: By Reason of Insanity!

Louis immerses himself in the world of Ohio's state psychiatric hospitals, meeting patients who have committed crimes - at times horrifically violent - while in the grip of severe mental illness.