Where to watch X: The Unknown(1956)
In the United States, you can watch X: The Unknown for free on Mometu.
Where to stream X: The Unknown
Data updated on October 9, 2026. Availability data from JustWatch.
X: The Unknown plot summary
It rises from 2000 miles below the earth to melt everything in its path!
Army radiation experiments awaken a subterranean monster from a fissure that feeds on energy and proceeds to terrorise a remote Scottish village. An American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure.
Details
- Release date
- September 21, 1956
- Runtime
- 1h 21m
- Genres
- Horror, Science Fiction, Mystery
- Directed by
- Leslie Norman
- Country
- United Kingdom
- TMDB rating
- 6.1 / 10 · 77 votes
X: The Unknown trailer
Cast
Dean JaggerDr. Adam Royston
Leo McKernInspector McGill
William LucasPeter Elliott
Edward ChapmanJohn Elliott
John HarveyMaj. Cartwright
Michael RipperSgt. Harry Grimsdyke
Anthony NewleyLCpl. 'Spider' Webb
Ian MacNaughtonPvt. Haggis
Peter HammondLt. Bannerman
Kenneth CopePvt. Lansing
FAQ
Where can I watch X: The Unknown?
In the United States, you can watch X: The Unknown for free on Mometu.
How long is X: The Unknown?
X: The Unknown runs 1h 21m (81 minutes).
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