the film, without interference of any kind from Corman. When the completed film was shown to him, Corman stormed out of the screening room and demanded that several changes be made, changes that Coppola did not agree with. According to Coppola, Corman "insisted on dubbing the picture the way he wanted it, adding voiceovers to simplify some of the scenes. Worse, he wanted extra violence added, another axe murder at least..." Jack Hill was later hired by Corman to shoot some brief sequences featuring actor Karl Schanzer as a comical poacher, who is beheaded by the murderer. Corman also complained the film was too short and insisted that it be padded out with at least another five minutes of footage. Gary Kurtz, one of Corman's assistants at the time, recalled, "So we shot this stupid prologue that had nothing to do with the rest of the film. It was some guy who was supposed to be a psychiatrist, sitting in his office and giving the audience a test to see if they were mentally fit to see the picture. The film was actually released with that prologue". The prologue was directed by Monte Hellman. This cheap William Castle-style gimmick also included a "D-13 Test" handout that was given to theater patrons. It was devised by a supposed "medical expert" to weed out psychologically unfit people from viewing the film. The test consisted of such questions as, "The most effective way of settling a dispute is with one quick stroke of an axe to your adversary's head?" and "Have you ever been hospitalized in a locked mental ward, sanitarium, rest home or other facility for the treatment of mental illness?" "Yes" or "No" were the only possible answers. Home media The Roan Group released the film on LaserDisc and DVD, both of which included an audio commentary by Campbell. The DVD also featured the original "D-13 Test" in digital form as an extra; the film's five-minute added prologue, which featured the test, has not been included on any of the film's numerous home video releases. Dementia 13 was released on Blu-ray April 26, 2011. Dementia 13 was restored to a director's cut in 2017 that was released to 1080p Blu-ray Disc and Digital 4k UHD on September 21, 2021. The Blu-ray from Lionsgate/Zoetrope includes an introduction and audio commentary by Francis Ford Coppola, and "Prologue (Dementia 13 Test)". Reception The film