Where to watch X: The Unknown (1956) in the UK
X: The Unknown (1956) is currently available to stream in the UK on Amazon Prime Video and Amazon Prime Video with Ads. It can also be rented from Apple TV Store and Amazon Video or bought from Apple TV Store, Amazon Video, Google Play Movies, and YouTube. Last verified on 5 May 2026 by ScreenSearch.
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.
Watch the trailer
4K Restoration | Official Trailer
Streaming options in the United Kingdom
Updated daily from The Movie Database. Outbound links open the provider directly.
Stream
Included with these subscription services in the UK.
Buy
Purchase a digital copy you keep in the storefront's library.
Last verified: — sourced from The Movie Database. Machine-readable: Markdown · JSON.
Cast & crew
Top-billed cast in X: The Unknown.
-
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
More horror & sci-fi on UK streaming
Browse other titles in the same genres, refreshed daily.
Browse by streaming service (UK)
See what else is on each service right now.
X: The Unknown — frequently asked questions
Where can I stream X: The Unknown in the UK?
X: The Unknown (1956) is currently included in subscriptions to Amazon Prime Video and Amazon Prime Video with Ads in the United Kingdom. Sign-in is required to play. Streaming licences change occasionally — ScreenSearch refreshes its data daily.
How much does it cost to rent X: The Unknown?
Rental prices vary by service and tier (HD vs 4K), typically £3.49 to £5.99 in the UK for a 48-hour rental. ScreenSearch links you straight to Apple TV Store and Amazon Video so you can check the current price.
Can I buy a digital copy of X: The Unknown?
Yes. X: The Unknown can be bought as a digital download from Apple TV Store, Amazon Video, Google Play Movies, and YouTube in the UK. A purchased digital copy lives in that storefront's library and stays available as long as the licence holds.
Is X: The Unknown on Netflix, Disney+ or Amazon Prime Video in the UK?
X: The Unknown is currently included with: Amazon Prime Video and Amazon Prime Video with Ads.
How accurate is this film's availability data?
Availability is sourced from The Movie Database (TMDB), which in turn pulls from JustWatch. Listings are refreshed daily. For purchase decisions, the provider's own site is the source of truth.
Looking for something else?
ScreenSearch indexes over a million films and TV shows. Type any title to instantly find where it's streaming in the UK.
Search any title