Movies Like X: The Unknown
If you loved X: The Unknown's Horror and Science Fiction storytelling, these films deliver a similar experience — carefully selected for tone, themes, and emotional depth. Each pick includes where to watch it right now.
★ Top Picks

The Beast from 20,000 Fathoms
The controlled explosion of an atomic bomb in the Arctic Circle awakens a frozen dinosaur that will wreak havoc in New York City.

28 Years Later
Twenty-eight years after the Rage virus outbreak, a heavily-defended island survives connected to the mainland by a single causeway. When one of the group leaves the island into the dark heart of the mainland, he discovers secrets, wonders, and horrors that have mutated not only the infected but other survivors as well.

Quatermass 2
In England, a group of space scientists led by Bernard Quatermass, who have developed plans for the first Moon colony, learn that a secret, ostensibly government-run, complex of identical design has been built in a remote part of England and is the focus of periodic falls of small, hollow "meteorites" originating in outer space. Quatermass determines to investigate and uncovers a terrifying extraterrestrial life form which has already begun action to take over the Earth.

Cold Storage
When a mutating, highly contagious fungus escapes a sealed facility, two employees – joined by a grizzled bioterror operative – must survive the wildest night shift ever to save humanity from extinction.

The Thing
When paleontologist Kate Lloyd travels to an isolated outpost in Antarctica for the expedition of a lifetime, she joins an international team that unearths a remarkable discovery. Their elation quickly turns to fear as they realize that their experiment has freed a mysterious being from its frozen prison. Paranoia spreads like an epidemic as a creature that can mimic anything it touches will pit human against human as it tries to survive and flourish in this spine-tingling thriller.

The Return
After the death of his father, a brilliant college student returns to his family home where he learns that the horrors from his childhood aren't as dead and gone as he once thought.

Lifeforce
A race of space vampires arrives in London and infects the populace, commencing an apocalyptic descent into chaos.
More Movies Like X: The Unknown

Splinter
When their plans for a nature trip go awry, Polly and boyfriend Seth decide to check into a motel. On their way, they're carjacked and kidnapped by low-rent crooks Dennis and Lacey, who take the victims and their SUV to a nearby gas station. Along the way, they encounter an increasingly terrifying horde of parasites, and if any of them intend to survive, they'll have to outsmart the deadly organisms.

Slither
A small town is taken over by an alien plague, turning residents into zombies and all forms of mutant monsters.

Arcadian
In the near future, on a decimated Earth, Paul and his twin sons face terror at night when ferocious creatures awaken. When Paul is nearly killed, the boys come up with a plan for survival, using everything their father taught them to keep him alive.

The Void
In the middle of a routine patrol, officer Daniel Carter happens upon a blood-soaked figure limping down a deserted stretch of road. He rushes the young man to a nearby rural hospital staffed by a skeleton crew, only to discover that patients and personnel are transforming into something inhuman. As the horror intensifies, Carter leads the other survivors on a hellish voyage into the subterranean depths of the hospital in a desperate bid to end the nightmare before it's too late.

Them!
As a result of nuclear testing, gigantic, ferocious mutant ants appear in the American desert southwest, and a father-daughter team of entomologists join forces with the state police officer who first discovers their existence, an FBI agent and, eventually, the US Army to eradicate the menace, before it spreads across the continent — and the world.

Underwater
After an earthquake destroys their underwater station, six researchers must navigate two miles along the dangerous, unknown depths of the ocean floor to make it to safety in a race against time.

Come Play
Oliver, a lonely autistic boy, seeks solace and refuge in his ever-present cell phone and tablet. When a mysterious creature uses the boy's devices against him, his parents must fight to save their son from the monster beyond the screen.

The Blob
In Arborville, California, three high school students try to protect their hometown from a gelatinous alien life form that engulfs everything it touches.

Color Out of Space
The Gardner family moves to a remote farmstead in rural New England to escape the hustle of the 21st century. They are busy adapting to their new life when a meteorite crashes into their front yard, melts into the earth, and infects both the land and the properties of space-time with a strange, otherworldly colour. To their horror, the family discovers this alien force is gradually mutating every life form that it touches—including them.

The Silence
With the world under attack by deadly creatures who hunt by sound, a teen and her family seek refuge outside the city and encounter a mysterious cult.

Event Horizon
In 2047, a group of astronauts are sent to investigate and salvage the starship Event Horizon which disappeared mysteriously seven years before on its maiden voyage. However, it soon becomes evident that something sinister resides in its corridors.
Why These Movies Are Similar
These recommendations share core qualities with X: The Unknown (1956): Horror and Science Fiction themes, similar narrative structure, and comparable emotional depth. NoBadPicks uses a combination of TMDB collaborative filtering, genre matching, and AI analysis to surface films most likely to resonate with fans of X: The Unknown.
See full details for X: The Unknown (1956)

