21 user 7 critic

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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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

Plot Summary | Add Synopsis


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 »
Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

1.37 : 1
See full technical specs »

Did You Know?


Features Patterson-Gimlin Film (1967) See more »

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User Reviews

This film is great!
22 March 2004 | by paul_s98See all my reviews

I can remember this movie coming to my local movie house as a child and I begged and begged my dad to take me but he refused knowing I would be scared senseless and I was.

I recently watched this movie again as an adult, and while not quite as scary, it was still charming and informative. The information presented is just as valid today as it was when the movie was made.

Especially entertaining is an ultra-serious Peter Graves who tries to convince the viewer that every bit of info presented is uncontestable proof that Bigfoot, the Yeti, and the Loch Ness Monster actually exist.

The re-enactments are fairly realistic and are not nearly as corny (or scary for that matter) as expected. The film is fast-paced and easy to understand.

While this isn't one of the all time great films ever made, "The Mysterious Monsters" is plenty entertaining, especially for true Sasquatch buffs. It is definitely worth a few hours of your time!

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