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The Mysterious Monsters (1975)

G | | Documentary | July 1976 (USA)
Peter Graves examines a range of supernatural topics, including mysterious monsters Bigfoot, the Loch Ness monster and the Yeti, and also psychics and hypnotism.


Robert Guenette


Robert Guenette


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Elderly Henrietta Winslow lives in an isolated mansion with her housekeeper and beloved cats. As her health fails, her greedy relatives gather in anticipation of her death.

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Credited cast:
Peter Graves ... Himself - Narrator
Peter Hurkos Peter Hurkos ... Himself
William Stenberg William Stenberg ... Himself
Sidney Walter Sidney Walter ... Himself (as Dr. Sidney Walter)
Jerilou Whelchel Jerilou Whelchel ... Herself
Rest of cast listed alphabetically:
Geoffrey Bourne Geoffrey Bourne ... Himself (as Dr. Geoffrey Bourne)
Lawrence Bradley Lawrence Bradley ... Himself (as Dr. Lawrence Bradley)
Gregory Brusey Gregory Brusey ... Himself (as Rev. Father Brusey)
Peter Byrne Peter Byrne ... Himself
John Cobb John Cobb ... Himself (archive footage)
Tim Dinsdale Tim Dinsdale ... Himself
John Green John Green ... Himself
Grover Krantz Grover Krantz ... Himself
Ed McLarney Ed McLarney ... Himself
Robert W. Morgan Robert W. Morgan ... Himself (as Robert Morgan)


One of the many notorious 70's "unknown" documentaries, The Mysterious Monsters covers topics such as Bigfoot and the Loch Ness Monster. Pictures, sounds, and videos of these two monsters are examined by Peter Graves, the host. Psychics, hypnotism, and the history of Bigfoot in many ancient cultures is also scrutinized. Written by Andrew Schaeffer

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PROOF! There are giant creatures living at the edge of our civilisation. See more »




G | See all certifications »






Release Date:

July 1976 (USA) See more »

Also Known As:

Bigfoot: The Mysterious Monster See more »

Company Credits

Production Co:

Sunn Classic Pictures See more »
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Technical Specs


Sound Mix:




Aspect Ratio:

1.37 : 1
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Did You Know?


Features Patterson-Gimlin Film (1967) See more »

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User Reviews

fascinating from start to finish
29 September 2001 | by dtucker86See all my reviews

Sunn Classic Pictures made some wonderful documentaries and this is by far the best. It is absolutely fascinating and i'm amazed at all they managed to cover about Bigfoot and Nessie in one film. The reenactments of the various sightings are very well done but may frighten kids. They frightened me when I was a kid and saw this film. I think the scariest scene was the one where the women is alone in her living room and Bigfoots shadow comes by and his hand crashes thru the window and then her husband opens the door and hes standing right there. This is the only documentary I have seen that includes a really inteligent detailed analysis of Roger Patterson's film of Bigfoot. Next to the Zapruder film, its the most famous home movie ever taken. Its also the only film I have seen that show's Patterson's film in its entirity. The only thing is that when the film talks about the Loch Ness Monster they show the famous "Surgeon's photo" of the head and neck of Nessie. In 1994, there was an old Englishman who confessed on his deathbed that picture was a hoax! Oh well, its still worth a look when it shows up on tv. Peter Graves is an excellent narrator.

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