"The Haunted" (1991) is one of the lesser-known films based on a case investigated by Ed and Lorraine Warren, but it was the first movie to include the couple onscreen. It follows Jack and Janet Smurl of West Pittston, PA, who claimed that a demon was haunting their home from 1974 to 1989. According to the couple, the demon attacked them, dragged them across rooms, and even threw their dog at a wall, per the Pocono Record. After investigating the home, Ed later claimed that he spotted a "dark mass" in the home and heard a voice telling him to "get out." Eventually, the Smurls turned to a series of priests and claimed that the demonic entity went away — for the most part — after a lot of prayers and exorcisms.
