Dementia 13 (released in the United Kingdom as The Haunted and the Hunted) 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 producer wanted a cheap Psycho copy, complete with gothic atmosphere and brutal killings, and Coppola quickly wrote a screenplay with Corman's requirements.

The producer declared it unreleasable and demanded several changes, including added scenes by directors Jack Hill[4] and Monte Hellman.

As Louise helps her mother-in-law into the castle, Lady Haloran tells her that she fainted because one of the fresh flowers she had thrown died as it touched Kathleen's grave.

Louise, realizing that Lady Haloran is emotionally overwrought and superstitious, devises a plan to convince the old woman that Kathleen is trying to communicate with her from beyond the grave.

Taking the bait, a gibbering Billy, who has gone insane with guilt over causing the death of his sister Kathleen, attempts to kill Richard's fiancée Kane with an axe.

Francis Ford Coppola worked as a sound man on Corman's The Young Racers (1963), a racing film which starred Campbell and Magee.

The speed at which the screenplay was completed resulted in unrealistic, "stilted" dialogue that Campbell recalled as being very difficult for the actors to speak.

[12] The majority of the American actors in the cast were friends of Coppola's from UCLA, and many of them paid their own way to Ireland for the opportunity to appear in a film.

Dementia 13 was one of several Roger Corman productions veteran B-movie character actor Campbell appeared in,[13] but it was the first that was completed on such a small budget.

The actor originally felt that it would turn out to be a strictly "amateur endeavor", but he soon became impressed by Coppola's leadership abilities, talent, and energy on the set.

Most of these films had been directed by Roger Corman, including a major role co-starring with Vincent Price in The Pit and the Pendulum (1961).

Like Campbell and Patrick Magee, Anders had been borrowed by Coppola from the cast of Corman's just-completed film The Young Racers.

After Dementia 13, Anders never had such a sizable role again, appearing in numerous small parts in both television and film until her death from breast cancer in 1996.

Magee's role as the family doctor who manages to solve the mystery in Dementia 13 was one of many horror film parts the Tony Award-winning actor accepted during the course of his distinguished career.

[19] Michael Weldon, in The Psychotronic Encyclopedia of Film, noted it had "[A] great trick ending, some truly shocking, gory axe murders, and lots of inventive photography".

[20] Tom Raynes, in the Time Out Film Guide, said "The location (an Irish castle) is used imaginatively; the Gothic atmosphere is suitably potent, and there's a wonderfully sharp cameo from Patrick Magee".

[21] Danny Peary, in his Guide for the Film Fanatic, stated that "despite the hopelessly confusing storyline ... the horror sequences are very exciting".

[22] Phil Hardy's The Aurum Film Encyclopedia: Horror opined, "[O]ne senses the presence of a director right from the moody opening sequence ... A piece of high gothic melodrama ...

[24] Kim Newman opined, "Coppola ... works fast and creative in Dementia 13... making memorable, shocking little sequences out of the killings and the implied haunting, using his locations well and highlighting unexpected eeriness like a transistor radio burbling distorted pop music as it sinks into a lake, along with a just-murdered corpse".

In the HBO series, The Sopranos, Meadow goes with her first college boyfriend to see the film in a revival house in the 6th episode of Season 3 entitled, “University”.