This documentary explores the real-life incident that inspired the 1973 film ‘The Exorcist’. In 1949, Catholic priests attempted to exorcise a 13-year-old boy who was seemingly possessed by demons. The event inspired William Peter Blatty to write his bestselling novel, but modern-day scientists now pour doubt on the veracity of the tale. In 1949, a 13-year-old boy in Cottage City, Maryland was apparently possessed by demons. The boy, who has never spoken about his ordeal and has never been identified, demonstrated extreme behaviour shortly after the death of his beloved aunt. The family experienced strange noises around the house and the boy’s bed began to shake violently. After bizarre markings appeared on his skin, the parents turned to the local hospital for help. When this proved fruitless, they called upon local priest Father Albert Hughes. The late Father Hughes’s colleague, Father Frank Bober, recalls the priest’s first meeting with the boy. “He noticed a very dark stare – almost as if there was nothing behind the eyes,” he says. When Hughes asked the boy his name, he replied, “I am legions” – indicating that numerous spirits had taken up residence inside his body. Hughes attempted the then little-known practice of exorcism to dispel the demons – to no avail. The family sought treatment in St Louis, where a priest named Father William Bowdern decided to embark upon nightly exorcisms. “Father Bowdern doesn’t want to do it. He doesn’t feel he has the training, but he feels obliged to help the kid,” explains author Tom Allen. The exorcism lasted six weeks, during which time the child swore, struggled and displayed fits of seemingly superhuman strength. Then, abruptly, his symptoms ended. The boy and his family returned to a life of relative obscurity. Decades later, author William Peter Blatty became fascinated by the tale. After reading Bowdern’s diary, he received a letter from the priest. At the end of t