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Where to watch X: The Unknown (1956)
X: The Unknown is streaming on Prime Video in 2 countries and Filmin in 1 country. It isn't on a subscription service in the US right now. In the UK, you can watch it on Prime Video.
X: The Unknown
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.
Also available regionally
Filmin
Quick answers
Is X: The Unknown on Netflix?
No. X: The Unknown isn't on Netflix in any country right now.
Is X: The Unknown on Prime Video?
Yes, X: The Unknown is on Prime Video in 2 countries, including the UK and Guernsey. It isn't on Prime Video in the US.
Is X: The Unknown on Disney+?
No. X: The Unknown isn't on Disney+ in any country right now.
Is X: The Unknown on Max?
No. X: The Unknown isn't on Max in any country right now.
Where can I watch X: The Unknown in the US?
X: The Unknown isn't on a subscription streaming service in the US right now. A VPN lets you watch it from a country where it is streaming.
Where can I watch X: The Unknown in the UK?
In the UK, X: The Unknown is streaming on Prime Video.
Where can I watch X: The Unknown in Canada?
X: The Unknown isn't on a subscription streaming service in Canada right now. A VPN lets you watch it from a country where it is streaming.
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Last updated October 7, 2026.