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.
You can now watch The Mysterious Monsters online on the following streaming providers in the United States.
| Directing | Robert Guenette | Director |
| Writing | Robert Guenette | Writer |
| Sound | Ruby Raksin | Original Music Composer |
| Production | Robert Guenette | Producer |
| Production | Raylan D. Jensen | Executive Producer |
| Production | Charles E. Sellier Jr. | Producer |
| Production | James L. Conway | Associate Producer |
| Camera | Tony Coggans | Director of Photography |
| Camera | Erik Daarstad | Director of Photography |
| Camera | David Myers | Director of Photography |
| Editing | Earle Herdan | Editor |
| Editing | Robert K. Lambert | Editor |
