6.2/10
2,219
62 user 30 critic

X the Unknown (1956)

Approved | | Horror, Sci-Fi | May 1957 (USA)
Trailer
0:53 | Trailer

On Disc

at Amazon

A radioactive, mud-like creature terrorizes a Scottish village.

Directors:

Leslie Norman, Joseph Losey (uncredited)

Writer:

Jimmy Sangster (story and screenplay)
Reviews

Videos

Photos

Learn more

More Like This 

Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.7/10 X  

Professor Bernard Quatermass' manned rocket ship returns to Earth, but two of the astronauts are missing and the survivor seems ill and unable to communicate.

Director: Val Guest
Stars: Brian Donlevy, Jack Warner, Margia Dean
Sci-Fi | Horror
    1 2 3 4 5 6 7 8 9 10 7/10 X  

Professor Quatermass, trying to gather support for his Lunar colonisation project, is intrigued by mysterious traces that have been showing up.

Director: Val Guest
Stars: Brian Donlevy, John Longden, Sidney James
Adventure | Horror
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

A kindly English botanist and a gruff American scientist lead an expedition to the Himalayas in search of the legendary Yeti.

Director: Val Guest
Stars: Forrest Tucker, Peter Cushing, Maureen Connell
Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.3/10 X  

Invisible atomic monsters attack a U.S. Armed Forces base and the local residents.

Director: Arthur Crabtree
Stars: Marshall Thompson, Terry Kilburn, Kynaston Reeves
Drama | Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.5/10 X  

Rocks from a meteor which grow when in contact with water threaten a sleepy Southwestern desert community.

Director: John Sherwood
Stars: Grant Williams, Lola Albright, Les Tremayne
The Reptile (1966)
Horror
    1 2 3 4 5 6 7 8 9 10 6.2/10 X  

In a Cornish village, various locals die from mysterious snake bites, but the coroner rules the deaths as heart attacks, until a family of newcomers starts an investigation.

Director: John Gilling
Stars: Noel Willman, Jennifer Daniel, Ray Barrett
Quatermass II (TV Mini-Series 1955)
Drama | Sci-Fi | Horror
    1 2 3 4 5 6 7 8 9 10 7.3/10 X  

Professor Quatermass is trying to perfect a dangerously unstable nuclear-powered rocket engine. After a disastrous test firing in Australia, his soon-to-be son-in-law, Captain John Dillon, ... See full summary »

Stars: John Robinson, Monica Grey, Hugh Griffith
Horror | Mystery | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 7.1/10 X  

A mysterious artifact is unearthed in London, and famous scientist Bernard Quatermass is called into to divine its origins and explain its strange effects on people.

Director: Roy Ward Baker
Stars: James Donald, Andrew Keir, Barbara Shelley
Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.6/10 X  

After being reanimated, Baron Frankenstein transfers the soul of a murdered young man into the body of a woman, prompting her to kill.

Director: Terence Fisher
Stars: Peter Cushing, Susan Denberg, Thorley Walters
Adventure | Horror
    1 2 3 4 5 6 7 8 9 10 6.9/10 X  

In 18th-century England, the Royal Crown sends Royal Navy Captain Collier and his crew to investigate reports of illegal smuggling and bootlegging in a coastal town where locals believe in Marsh Phantoms.

Director: Peter Graham Scott
Stars: Peter Cushing, Yvonne Romain, Patrick Allen
Drama | Horror | Sci-Fi
    1 2 3 4 5 6 7 8 9 10 6.4/10 X  

A centenarian artist and scientist in 1890 Paris maintains his youth and health by periodically replacing a gland with that of a living person.

Director: Terence Fisher
Stars: Anton Diffring, Hazel Court, Christopher Lee
Drama | Sci-Fi | Romance
    1 2 3 4 5 6 7 8 9 10 7.2/10 X  

When the U.S. and Russia unwittingly test atomic bombs at the same time, it alters the nutation (axis of rotation) of the Earth.

Director: Val Guest
Stars: Edward Judd, Janet Munro, Leo McKern
Edit

Cast

Cast overview, first billed only:
Dean Jagger ... Dr. Adam Royston
Edward Chapman ... John Elliott
Leo McKern ... Insp. 'Mac' McGill
Anthony Newley ... LCpl. 'Spider' Webb
Jameson Clark Jameson Clark ... Jack Harding
William Lucas ... Peter Elliott
Peter Hammond ... Lt. Bannerman
Marianne Brauns Marianne Brauns ... Zena, the Nurse
Ian MacNaughton Ian MacNaughton ... Haggis (as Ian McNaughton)
Michael Ripper ... Sgt. Harry Grimsdyke
John Harvey John Harvey ... Maj. Cartwright
Edwin Richfield ... Soldier Burned on Back
Jane Aird Jane Aird ... Vi Harding
Norman MacOwan Norman MacOwan ... Old Tom (as Norman Macowan)
Neil Hallett ... Unwin (as Neil Hallet)
Edit

Storyline

British Army radiation drills at a remote Scottish base attract a subterranean, radioactive entity of unknown nature that vanishes, leaving two severely radiation-burned soldiers... and a "bottomless" crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to "absorb" radiation from any source, growing bigger and bigger. What is it?? How do you destroy a thing that "feeds" on energy? Written by Rod Crawford <puffinus@u.washington.edu>

Plot Summary | Plot Synopsis

Taglines:

Can anything escape its terror? See more »

Genres:

Horror | Sci-Fi

Certificate:

Approved | See all certifications »

Parents Guide:

View content advisory »
Edit

Details

Country:

UK

Language:

English

Release Date:

May 1957 (USA) See more »

Also Known As:

La incógnita X See more »

Company Credits

Show more on IMDbPro »

Technical Specs

Runtime:

Sound Mix:

Mono (RCA Sound Recording)

Aspect Ratio:

1.37 : 1
See full technical specs »
Edit

Did You Know?

Trivia

According to Jimmy Sangster, director Leslie Norman was not overly interested in making this film, but did anyway for the sake of work. Dean Jagger and other crew members, not to mention Hammer brass, all found Norman very difficult to work with, so much so that despite the film receiving some good notices, Hammer never worked with Norman again. See more »

Goofs

Lansing watches the stick sinking in a pool of liquid, but in a later long shot the stick in seen firmly standing in dry ground. See more »

Quotes

Dr. Adam Royston: It's on its way for the biggest meal of its life.
See more »

Connections

Referenced in The Blob (1958) See more »

Soundtracks

Serenade for Strings in E Major, Op. 22: V. Finale: Allegro vivace
(uncredited)
Written by Antonín Dvorák
See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Hard SF classic creepy from start to finish
24 December 2002 | by telepinus1525See all my reviews

Back in the days when "Prince Valiant" still covered most of a page in the Sunday funnies, I first saw this wonderfully creepy SF sleeper. From the opening scenes of a stretch of the Scottish moors opening up under a British soldier's feet, I was hooked. I was very lucky that my parents didn't send me to bed then(although they did right in the middle of "From Hell It Came", but that's another story); I was resolved to catch it again just to get that creepy feeling! The ominous P.O.V. shots of the "X" monster shambling through the barren woods at night, the outrageous "melting" death by hard radiation of the medical tech in the X-ray room, Dean Jagger as Dr. Royston, describing his new invention that can (theoretically) speed up decay of radioactive materials without causing flare-ups(!) simply by leeching away its' energy, and the film's creepy, near-ambiguous ending ("We did destroy it...didn't we?") showed just what you could--and can!--still do with a small budget and respect for the material.


13 of 14 people found this review helpful.  Was this review helpful to you? | Report this
Review this title | See all 62 user reviews »

Contribute to This Page

Stream Trending TV Series With Prime Video

Explore popular and recently added TV series available to stream now with Prime Video.

Start your free trial



Recently Viewed