The Unknown Terror Poster

The Unknown Terror 1957

★ 5.015 votes76 min📅 1957-08-12

"They dared enter the Cave of Death to explore the secrets of hell!"

Directed by Charles Marquis Warren, *The Unknown Terror (1957)* plunges viewers into a claustrophobic horror adventure where a determined woman leads an expedition into an uncharted jungle to uncover the fate of her missing brother.

Director: Charles Marquis Warren

Cast

John Howard
John Howard
Dan Matthews
Mala Powers
Mala Powers
Gina Matthews
Paul Richards
Paul Richards
Peter Morgan
May Wynn
May Wynn
Concha Ramsey
Gerald Milton
Gerald Milton
Dr. Ramsey
Duane Grey
Duane Grey
Lino
Richard Gilden
Richard Gilden
Raoul Koom
Martín Garralaga
Martín Garralaga
Lead Villager
Patrick O'Moore
Patrick O'Moore
Dr. Willoughby
William Hamel
Mr. Trainor

Frequently Asked Questions

What is *The Unknown Terror* (1957) about?

When a woman ventures into a remote jungle to find her missing brother, she uncovers a sinister scientist running experiments with a flesh-eating fungus. The expedition quickly turns into a fight for survival against both the jungle's horrors and the madman's twisted creations.

Who directed *The Unknown Terror*?

Charles Marquis Warren helmed this 1957 horror thriller, known for his work in Westerns and early sci-fi.

Who stars in *The Unknown Terror*?

John Howard, Mala Powers, Paul Richards, May Wynn, and Gerald Milton lead the cast of this gripping jungle horror.

Is *The Unknown Terror* (1957) worth watching?

While it's not a household name, *The Unknown Terror* delivers a solid dose of 1950s B-movie horror with a unique premise and tight pacing. Fans of vintage sci-fi thrillers or eerie jungle-set stories may find it a hidden gem worth tracking down.

How long is *The Unknown Terror*?

The film runs for 76 minutes, making it a brisk and engaging watch.

🎥 Trailer

The Unknown Terror (1957): A Claustrophobic Jungle Horror Classic — Full Movie Info

Directed by Charles Marquis Warren, *The Unknown Terror (1957)* plunges viewers into a claustrophobic horror adventure where a determined woman leads an expedition into an uncharted jungle to uncover the fate of her missing brother. Instead of answers, she stumbles upon a deranged scientist's secret lair, where a monstrous fungus thrives, feeding on the local population in a grotesque display of nature's corruption. The film blends classic horror tropes with a pulpy, mid-century sci-fi edge, creating an atmosphere thick with dread and the unknown.

This forgotten gem of 1950s horror leans into themes of scientific hubris and primal terror, as the jungle itself seems to resist human intrusion. With a tight 76-minute runtime, *The Unknown Terror (1957)* keeps the pulse racing, balancing suspense with B-movie charm. John Howard and Mala Powers anchor the cast, grounding the bizarre premise in a veneer of earnest drama.