Movie

The Unknown Terror

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

★ 5.3(16)19571h 16m

The Unknown Terror isn't available to stream, rent or buy in Mexico right now. Availability changes often, so check back soon. Availability checked 11 June 2026.

Where to watch The Unknown Terror

🇲🇽 Mexico

No streaming, rental or purchase options are listed in Mexico right now. Availability changes often — try switching your region in the header.

Streaming in other regions

🇫🇷 FR

Good to know

Director: Charles Marquis Warren
Release date: 1957-08-12
Runtime: 1h 16m
Language: English
Status: Released
Country: United States of America
Studio: Emirau Productions

The Unknown Terror — trailer

About The Unknown Terror

The Unknown Terror is a 1957 movie in the Horror genre, directed by Charles Marquis Warren, starring John Howard, Mala Powers and Paul Richards. It has a runtime of 1 hour 16 minutes. It holds an average rating of 5.3/10 from 16 viewers. Below you can see where to watch The Unknown Terror in Mexico — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Synopsis

A woman leads an expedition into a remote jungle to find her long-lost brother, but instead finds a mad scientist who has created a fungus monster that feeds on the local inhabitants.

Cast

John Howard

Dan Matthews

Mala Powers

Gina Matthews

Paul Richards

Peter Morgan

May Wynn

Concha Ramsey

Gerald Milton

Dr. Ramsey

Duane Grey

Lino

Richard Gilden

Raoul Koom

Martín Garralaga

Lead Villager

Patrick O'Moore

Dr. Willoughby

William Hamel

Mr. Trainor

Charles Grey

Jim Wheatley / ?The Monster Man

Charles Postal

Higgs (butler)

Themes & keywords

amazon rainforestmad scientistmissing personunderground cavernman with limpfungus peopleprimitive village

Frequently asked questions

Where can I watch The Unknown Terror in Mexico?+

The Unknown Terror is not currently listed on any streaming, rental or purchase service in Mexico. Availability changes often, so check back or switch your region.

Is The Unknown Terror on Netflix?+

The Unknown Terror is not on Netflix in Mexico right now.

How long is The Unknown Terror?+

The Unknown Terror has a runtime of 1 hour 16 minutes (76 minutes).

Who stars in The Unknown Terror?+

The Unknown Terror stars John Howard, Mala Powers, Paul Richards, May Wynn and Gerald Milton.

When did The Unknown Terror come out?+

The Unknown Terror is a 1957 movie directed by Charles Marquis Warren.

What genre is The Unknown Terror?+

The Unknown Terror is Horror film.

Who directed The Unknown Terror?+

The Unknown Terror was directed by Charles Marquis Warren.