Is X: The Unknown scary?

MyCinema has not rated X: The Unknown for scares yet. TMDB lists it as a horror, science fiction, and mystery film.

Where can I watch X: The Unknown in the US?

X: The Unknown is free on Mometu in the US. Listings come from JustWatch and can change, so check the service before paying.

How long is X: The Unknown?

X: The Unknown runs 1 hour 21 minutes (81 minutes).

Is X: The Unknown suitable for kids?

TMDB lists no age rating for X: The Unknown in the United States or the United States. Treat it as unsuitable for children until you have checked it yourself.

TMDB19561h 21mHorror / Science Fiction / Mystery

X: The Unknown

Name: X: The Unknown
Genre: Horror, Science Fiction, Mystery
Released: 1956-09-21
Duration: 81 min

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.

TMDB audience score

Based on 77 votes

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Availability in the US

Where the story is waiting

Provider listings are supplied by JustWatch through TMDB. Verify pricing and availability before renting or subscribing.

Show availability for

Mometuads

United States listings · Refreshed 12 Oct 2026. More horror to watch in the US

MyCinema quick facts

X: The Unknown at a glance

Worked out from the film's TMDB record and its United States provider listings. These are facts about the data, not a review.

Runtime

Short watch · 1h 21m

At 1h 21m it runs under 90 minutes.

More horror under 90 minutes

Genres

Horror · Science Fiction · Mystery

TMDB files it under horror, science fiction, and mystery.

US availability

1 free

Not listed on a subscription service. Free or ad-supported on Mometu.

TMDB audience score

6.1 / 10 on TMDB

TMDB users rate it 6.1 out of 10 across 77 votes, a positive audience score. That is a moderate sample of voters.

Why watch X: The Unknown tonight

It is a short one: 1h 21m, so it fits a late start.
It is free to watch on Mometu in the US.
TMDB users rate it 6.1 out of 10 across 77 votes.
There is a trailer on this page if you want a look first.

How scary is X: The Unknown?

The scare meter is MyCinema's own rating, given by a person who has watched the film. It is not a TMDB score.

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Questions about X: The Unknown

Is X: The Unknown scary?: MyCinema has not rated X: The Unknown for scares yet. TMDB lists it as a horror, science fiction, and mystery film.
Where can I watch X: The Unknown in the US?: X: The Unknown is free on Mometu in the US. Listings come from JustWatch and can change, so check the service before paying.
How long is X: The Unknown?: X: The Unknown runs 1 hour 21 minutes (81 minutes).
Is X: The Unknown suitable for kids?: TMDB lists no age rating for X: The Unknown in the United States or the United States. Treat it as unsuitable for children until you have checked it yourself.

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X: The Unknown

Where the story is waiting

X: The Unknown at a glance

Why watch X: The Unknown tonight

How scary is X: The Unknown?

Did X: The Unknown scare you?

Questions about X: The Unknown

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