X: The Unknown
1956, English. Directed by Leslie Norman.
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.
- Runtime
- 1h 21m
- Post-credits
- None listed
- Language
- English
- Rated
- Check local
Start now and it ends at ….
Popcorn Flick
Fun if you don’t overthink it.
6.1/10 from 78 TMDB viewer ratings.
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Where to watch X: The Unknown
X: The Unknown isn’t on a subscription OTT platform in India, but you can watch it free online.
Free
MometuAvailability in India as of 6 November 2026. Streaming data by JustWatch.
Cast & crew
- Leslie NormanDirector
- 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
- Michael BrookeWillie Harding
- Frazer HinesIan Osborn
Details
- Released
- 21 September 1956
- Country
- United Kingdom
- Written by
- Jimmy Sangster
Check ratings elsewhere
News & fan talk
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X: The Unknown: quick answers
Is X: The Unknown worth watching?
Our verdict is Popcorn Flick: Fun if you don’t overthink it. It scores 6.1/10 from 78 TMDB viewer ratings.
How long is X: The Unknown?
X: The Unknown runs 81 minutes (1h 21m).
Does X: The Unknown have a post-credits scene?
None is listed for X: The Unknown. Viewers tag these on TMDB, so a brand-new film may not be tagged yet.
X: The Unknown parents guide: is it suitable for kids?
No age rating is listed for X: The Unknown yet.
Which OTT platform is X: The Unknown on?
X: The Unknown isn’t on a subscription OTT platform in India, but you can watch it free online. (Checked 6 November 2026.)
What movies are like X: The Unknown?
If you liked X: The Unknown, try The Return of Doctor X, The Invasion, Quatermass 2.
Who directed X: The Unknown?
X: The Unknown (1956) was directed by Leslie Norman and stars Dean Jagger, Leo McKern, William Lucas.