Dementia 13
- Blwyddyn: 1963
- Gwlad: Ireland, United States of America
- Genre: Horror, Mystery, Thriller
- Stiwdio: The Filmgroup, Roger Corman Productions, American International Pictures
- Allweddair: heart attack, castle, pond, will, ceremony, psychotronic, proto-slasher
- Cyfarwyddwr: Francis Ford Coppola
- Cast: William Campbell, Luana Anders, Bart Patton, Mary Mitchel, Patrick Magee, Eithne Dunne