
The Mysterious Monsters
- Blwyddyn: 1976
- Gwlad: United States of America
- Genre: Documentary, Horror, Fantasy
- Stiwdio: Sunn Classic Pictures
- Allweddair: paranormal phenomena, hypnosis, bigfoot, yeti, loch, alien, conspiracy theory, ufo, psychic power
- Cyfarwyddwr: Robert Guenette
- Cast: Peter Graves, Peter Hurkos, William Stenberg, Sidney Walter, Jerilou Whelchel, Roger Patterson