Movies like The Intruder Within (1981)
The best movies like The Intruder Within (1981) are Megaboa (2021), Underwater (2020) and The Thing (2011). If The Intruder Within hooked you with its horror and science fiction, these 30 similar films are what to watch next, and every pick says why it matches.
Quick picks
- Highest ratedThe Thing (1982)8.1/10 from 8,439 votes
- NewestSignal One (2026)Released 2026
Megaboa (2021)
On a trip to Colombia, a group of college students encounter a fifty-foot boa constrictor, hungry for blood.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisUnderwater (2020)
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.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisThe Thing (2011)
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.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisSplinter (2008)
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.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisBlood and Snow (2023)
When researchers rescue a fellow scientist who survived a meteorite strike in the Arctic, they discover she may not be who they think she is. Is she some-how changed?
Why it matches: Recommended by TMDB viewers · both science fiction & horror
Popcorn FlickMovies like thisIsland of Terror (1966)
When a small island community becomes overrun with creeping, blobbish, tentacled monsters that liquefy and digest the bones from living creatures, the community struggles to fight back.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
SnoozefestMovies like thisDark Light (2019)
A woman returns to her family home and discovers it to be inhabited by monsters.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisExtinction (2015)
And suddenly, overnight, the world came to a halt. Two men, two survivors, one kid, and hatred that separates them. A place forgotten by everyone, including the creatures that inhabit the Earth... until now.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisEvent Horizon (1997)
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 it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisPrometheus (2012)
A team of explorers discover a clue to the origins of mankind on Earth, leading them on a journey to the darkest corners of the universe. There, they must fight a terrifying battle to save the future of the human race.
Why it matches: Recommended by TMDB viewers · both science fiction & horror
Popcorn FlickMovies like thisBooks of Blood (2020)
A journey into uncharted and forbidden territory through three tales tangled in space and time.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisDie Alone (2024)
Lost in a world reclaimed by nature and overrun by mysterious creatures, Ethan, a young man with amnesia navigates the dangerous landscape in search of his lost love Emma. His journey takes an unexpected turn when he encounters Mae, a hardened and eccentric survivor. Together, Ethan and Mae face threats both human and otherwise before a fateful encounter with Kai unravels a secret that lies just beyond Ethan's fractured memory.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisDoctor Who: Planet of the Dead (2009)
A meeting in a London bus with jewel thief Lady Christina takes a turn for the worse for the Doctor when the bus takes a detour to a desert-like planet, where the deadly Swarm awaits.
Why it matches: Recommended by TMDB viewers · both science fiction
Worth the HypeMovies like thisSlash/Back (2022)
In a remote Arctic community, a group of Inuit girls fight off an alien invasion, all while trying to make it to the coolest party in town.
Why it matches: Recommended by TMDB viewers · both science fiction & horror
Popcorn FlickMovies like thisYear 10 (2024)
After the fall of civilization, the few survivors have been driven to cannibalism. A young man must confront a violent tribe that has murdered his father and stolen the medicine that keeps his girlfriend alive.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Popcorn FlickMovies like thisIsland of Lost Souls (1932)
An obsessed scientist conducts profane experiments in evolution, eventually establishing himself as the self-styled demigod to a race of mutated, half-human abominations.
Why it matches: Recommended by TMDB viewers · both science fiction & horror
Popcorn FlickMovies like thisThe Signal (2007)
A horror film told in three parts, from three perspectives, in which a mysterious transmission that turns people into killers invades every cell phone, radio, and television.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
SnoozefestMovies like thisThe Meg (2018)
A deep sea submersible pilot revisits his past fears in the Mariana Trench, and accidentally unleashes the seventy foot ancestor of the Great White Shark believed to be extinct.
Why it matches: Recommended by TMDB viewers · both science fiction & horror
Popcorn FlickMovies like thisAlien: Romulus (2024)
While scavenging the deep ends of a derelict space station, a group of young space colonizers come face to face with the most terrifying life form in the universe.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Worth the HypeMovies like thisSignal One (2026)
A computer scientist is invited by a tech billionaire to join his private facility on a Caribbean island to investigate extraterrestrial matter on Earth. When they make contact beyond our world, chaos erupts as we’re left to wonder: do they come in peace?
Why it matches: Recommended by TMDB viewers · both science fiction
Popcorn FlickMovies like thisDinosaur Hotel (2021)
Sienna is desperate to win a large cash prize in a secret underground game show. However, Dinosaur's begin to hunt her down for the entertainment of the rich and wealthy. Can she be the last to survive the horrific night to win the prize?
Why it matches: Similar story and style · both horror & science fiction
SnoozefestMovies like thisCreature from the Black Lagoon (1954)
When scientists exploring the Amazon River stumble on a “missing link” connecting humans and fish, they plan to capture it for later study. But the Creature has plans of his own, and has set his sights on the lead scientist's beautiful fiancée, Kay.
Why it matches: Similar story and style · both horror & science fiction
Popcorn FlickMovies like thisThe Thing (1982)
A research team in Antarctica is hunted by a shape-shifting alien that assumes the appearance of its victims.
Why it matches: Similar story and style · both horror & science fiction
Absolute CinemaMovies like thisBoa vs. Python (2004)
After an overly ambitious businessman transports an 80-foot python to the United States, the beast escapes and starts to leave behind a trail of human victims. An FBI agent and a snake specialist come up with a plot to combat the creature by pitting it against a bioengineered, 70-foot boa constrictor. It's two great snakes that snake great together!
Why it matches: Similar story and style · both horror & science fiction
SnoozefestMovies like thisPterodactyl (2004)
A dormant volcano deep with the Turkish forest holds within it a deadly secret. Perfectly preserved, a nest of pterodactyl eggs are ready to hatch...
Why it matches: Similar story and style · both horror & science fiction
SnoozefestMovies like thisMegalodon (2004)
A skeptical news reporter is invited by the CEO of Nexecon Petroleum to document the safety of Colossus, the largest drilling and refining platform ever constructed. As the powerful drill tears through the seabed, a fissure forms, revealing a hidden mirror ocean teeming with prehistoric life. When a team is sent to access the damage, it comes face to face with the most powerful oceanic predator that ever lived: Carcharodon Megalodon.
Why it matches: Similar story and style · both horror & science fiction
SnoozefestMovies like thisPrimitive War (2025)
During the Vietnam War, a recon unit ventures to an isolated jungle valley to uncover the fate of a missing platoon. They soon find themselves in a fight for their lives against an unexpected enemy — prehistoric dinosaurs.
Why it matches: Similar story and style · both horror & science fiction
Popcorn FlickMovies like thisMothra vs. Godzilla (1964)
Journalists Ichiro Sakai and Junko cover the wreckage of a typhoon when an enormous egg is found and claimed by greedy entrepreneurs. Mothra's fairies arrive and are aided by the journalists in a plea for its return. As their requests are denied, Godzilla arises near Nagoya and the people of Infant Island must decide if they are willing to answer Japan's own pleas for help.
Why it matches: Similar story and style · both science fiction
Worth the HypeMovies like thisLilliput in Antarctica (1990)
Follows Cousteau on a trip to Antarctica with 6 children, each chosen to represent one of the other continents in order to raise awareness about the global significance of Antarctica, the continent most crucial to world climate regulation.
Why it matches: Similar story and style
Angel's Egg (1985)
In the ruins of a strange city, a young girl takes care of a large egg she holds carefully in her arms. She bonds with a boy who is searching for a bird he saw in a dream.
Why it matches: Similar story and style · both science fiction
Worth the HypeMovies like this
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Frequently asked questions
What are the best movies like The Intruder Within?
The closest matches to The Intruder Within are Megaboa (2021), Underwater (2020) and The Thing (2011). Below are 27 more, each with the reason it matches.
What should I watch after The Intruder Within?
Start with Megaboa (2021), the closest match to The Intruder Within.
What is the highest-rated movie like The Intruder Within?
The Thing (1982), rated 8.1/10 by 8,439 TMDB users.
What is the newest movie like The Intruder Within?
Signal One (2026) is the most recent release on this list.
Are there English movies like The Intruder Within?
Yes: Megaboa (2021), Underwater (2020) and The Thing (2011).
How are movies similar to The Intruder Within chosen?
First come films that Trakt’s viewers watch alongside The Intruder Within, then TMDB’s recommendations and films it rates as similar in story and genre. Each pick says which signal put it there.