In 1971, William Blatty wrote a novel about a young girl that becomes demonically possessed. That novel was turned into the perennial horror classic The Exorcist. The subject matter was inspired true events; a young boy named Roland Doe was dispossessed of demons after several weeks of repeated exorcisms in St. Louis, Missouri. In this episode, we explore the mystery of ritual exorcism and what it says about how we perceive mental illness.
