Dementia 13 is a 1963 horror thriller film written and directed by Francis Ford Coppola in his feature film directorial debut, and starring William Campbell, Luana Anders, Bart Patton, Mary Mitchell, Eithne Dunne, and Patrick Magee. The film was produced by Roger Corman for his company The Filmgroup, and released in the United States by American International Pictures during the fall of 1963, as the bottom half of a double feature with Corman's X: The Man with the X-ray Eyes.