The Unknown Terror (1957): cast, story & where to watch
1957 · Film · ★ 4.9
Released in 1957, The Unknown Terror is a horror film directed by Charles Marquis Warren, running about 76 minutes. “They dared enter the Cave of Death to explore the secrets of hell!” — that tagline sets the tone.
What it’s about. 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.
Who’s in it. The Unknown Terror stars John Howard as Dan Matthews, Mala Powers as Gina Matthews, May Wynn as Concha Ramsey and Gerald Milton as Dr. Ramsey, among others.
How it landed. With an audience score of 4.9/10, The Unknown Terror has proved divisive with audiences.
Where to watch. Streaming options change often. See the full, country-by-country breakdown on our where to watch The Unknown Terror page.
If you liked it. Fans of The Unknown Terror tend to enjoy Psycho, The Silence of the Lambs, The Shining and Alien.
Frequently asked
- Where can I watch The Unknown Terror (1957)?
- Streaming, rental and purchase options for The Unknown Terror change frequently. Check our where-to-watch page for the latest availability in your country.
- Is The Unknown Terror worth watching?
- The Unknown Terror holds an audience score of 4.9 out of 10, and is a strong pick if you enjoy horror. Reactions are mixed, so it may depend on taste.
- Who stars in The Unknown Terror?
- The Unknown Terror stars John Howard, Mala Powers, May Wynn, Gerald Milton and Duane Grey.
- When was The Unknown Terror released?
- The Unknown Terror was released in 1957, with a runtime of about 76 minutes.