Movies like The Alien Within (1990)
The best movies like The Alien Within (1990) are Clayface (2026), Gigantis, the Fire Monster (1959) and Books of Blood (2020). If The Alien Within hooked you with its science fiction and horror, these 30 similar films are what to watch next, and every pick says why it matches.
The Alien Within
Quick picks
- Highest ratedKing Kong (1933)7.6/10 from 1,696 votes
- NewestClayface (2026)Released 2026
Clayface (2026)
Matt Hagen's meteoric rise from Gotham street kid to Hollywood leading man is tragically cut short when a local crime boss's actions leave him horribly disfigured. Abandoned by his team and with nothing left, Matt seeks out a cutting edge treatment that miraculously returns him to his former self… but also unexpectedly affects his grip on reality, spiraling him down a destructive path of all-consuming revenge.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
Worth the HypeMovies like thisGigantis, the Fire Monster (1959)
A prehistoric monster called Gigantis emerges alongside another creature named Angurus.
Why it matches: Recommended by TMDB viewers · both horror & science fiction
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 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 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 thisDonovan's Brain (1953)
A scientist takes the brain of dead man and revives it via electrodes as it lays suspended in a tank of liquid. Soon, the brain grows to possess enormous psychic powers and inflicts its personality upon the doctor who saved it, creating a "Jekyll and Hyde" paradigm.
Why it matches: Recommended by TMDB viewers · both science fiction & horror
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 thisNightbreed (1990)
A troubled young man is drawn to a mythical place called Midian where a variety of friendly monsters are hiding from humanity. Meanwhile, a sadistic serial killer is looking for a patsy.
Why it matches: Recommended by TMDB viewers · both horror
Popcorn FlickMovies like thisThe Unhealer (2021)
A botched faith healing bestows supernatural Shaman powers on a bullied teenager. When his lifelong tormentors pull a prank that kills someone he loves, he uses his powers for revenge and goes on a bloody rampage to settle the score.
Why it matches: Recommended by TMDB viewers · both horror
SnoozefestMovies like thisMonster High 2 (2023)
As they enter sophomore year at Monster High, Clawdeen Wolf, Draculaura and Frankie Stein face new students, new powers, and an even bigger threat that could not only tear their friendship apart but could change the world forever.
Why it matches: Recommended by TMDB viewers · both science fiction
Popcorn FlickMovies like thisGinger Snaps 2: Unleashed (2004)
Brigitte has escaped the confines of Bailey Downs but she's not alone. Another werewolf is tailing her closely and her sister's specter haunts her. An overdose of Monkshood - the poison that is keeping her transformation at bay - leads to her being incarcerated in a rehabilitation clinic for drug addicts where her only friend is an eccentric young girl by the name of Ghost.
Why it matches: Recommended by TMDB viewers · both horror
Popcorn FlickMovies like thisSlapface (2022)
A boy deals with the loss of his mother by creating a relationship with a dangerous monster.
Why it matches: Recommended by TMDB viewers · both horror
SnoozefestMovies like thisWerewolf by Night (2022)
On a dark and somber night, a secret cabal of monster hunters emerge from the shadows and gather at the foreboding Bloodstone Temple following the death of their leader. In a strange and macabre memorial to the leader’s life, the attendees are thrust into a mysterious and deadly competition for a powerful relic—a hunt that will ultimately bring them face to face with a dangerous monster.
Why it matches: Recommended by TMDB viewers · both horror
Worth the HypeMovies like thisNever Let Go (2024)
As an evil takes over the world beyond their front doorstep, the only protection for a mother and her twin sons is their house and their family’s protective bond.
Why it matches: Recommended by TMDB viewers · both horror
Popcorn FlickMovies like thisLust for a Vampire (1971)
In 1830, the Karnstein heirs use the blood of an innocent to bring forth the evil that is the beautiful Mircalla - or as she was in 1710, Carmilla. The nearby Finishing School offers rich pickings not only in in the blood of nubile young ladies but also with the headmaster who is desperate to become Mircalla's disciple, and the equally besotted and even more foolish author Richard Lestrange.
Why it matches: Recommended by TMDB viewers · both horror
SnoozefestMovies like thisScream Blacula Scream (1973)
After an aging voodoo priestess dies, her arrogant son Willis Daniel's believes he is next in line to lead. He is outraged when Lisa, his mother's adopted apprentice is chosen as the leader. Willis seeks revenge by reviving the African prince Blacula — but soon finds that he cannot control him.
Why it matches: Recommended by TMDB viewers · both horror
SnoozefestMovies like thisA Knight's War (2025)
A fearless knight braves a deadly realm to save the Chosen One’s soul. Facing witches, demons, and brutal foes, he discovers her return could ignite chaos and doom humanity.
Why it matches: Recommended by TMDB viewers · both horror
Popcorn FlickMovies like thisGoodnight Mommy (2022)
When twin brothers arrive home to find their mother’s demeanor altered and face covered in surgical bandages, they begin to suspect the woman beneath the gauze might not be their mother.
Why it matches: Recommended by TMDB viewers · both horror
Popcorn FlickMovies like thisHulk: Where Monsters Dwell (2016)
This All Hallows’ Eve, Nightmare is bent on conquering our waking world by crossing through the Dream Dimension, and converting each dreamer into a monster. Can Dr. Strange, Hulk and the Howling Commandos hold the line and put an end to his nefarious scheme?
Why it matches: Recommended by TMDB viewers · both science fiction
Popcorn FlickMovies like thisBride of Frankenstein (1935)
After recovering from injuries sustained in the mob attack upon himself and his creation, Dr. Henry Frankenstein falls under control of his former mentor, Dr. Pretorius, who insists the now-chastened doctor resume his experiments in creating new life. Meanwhile, the Monster remains on the run from those who wish to destroy him.
Why it matches: Similar story and style · both horror & science fiction
Worth the HypeMovies like thisThe Relic (1997)
A homicide detective teams up with an evolutionary biologist to hunt a giant creature that is killing people in a Chicago museum.
Why it matches: Similar story and style · both horror & science fiction
Popcorn FlickMovies 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 thisThem! (1954)
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.
Why it matches: Similar story and style · both science fiction & horror
Popcorn FlickMovies like thisClass of Nuke 'Em High (1986)
The pupils at a high school next to a nuclear power plant start acting and looking strange after buying contaminated drugs from a plant worker.
Why it matches: Similar story and style · both horror & science fiction
SnoozefestMovies like thisQuatermass 2 (1957)
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.
Why it matches: Similar story and style · both science fiction & horror
Popcorn FlickMovies like thisDr. Orloff's Monster (1965)
A mad scientist creates a hideous monster to carry out his murderous plans...
Why it matches: Similar story and style · both horror & science fiction
King Kong (1933)
Adventurous filmmaker Carl Denham sets out to produce a motion picture unlike anything the world has seen before. Alongside his leading lady Ann Darrow and his first mate Jack Driscoll, they arrive on an island and discover a legendary creature said to be neither beast nor man. Denham captures the monster to be displayed on Broadway as King Kong, the eighth wonder of the world.
Why it matches: Similar story and style · both horror
Worth the HypeMovies like thisDracula (1931)
A British estate agent travels to Transylvania to meet with the mysterious Count Dracula, who is interested in leasing a London castle. After Dracula enslaves and drives the agent to insanity, the pair return to London together, where Dracula, a secret bloodsucker, begins preying on socialites.
Why it matches: Similar story and style · both horror
Worth the HypeMovies like thisHulk (2003)
Bruce Banner, a genetics researcher with a tragic past, suffers massive radiation exposure in his laboratory that causes him to transform into a raging green monster when he gets angry.
Why it matches: Similar story and style · both science fiction
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Frequently asked questions
What are the best movies like The Alien Within?
The closest matches to The Alien Within are Clayface (2026), Gigantis, the Fire Monster (1959) and Books of Blood (2020). Below are 27 more, each with the reason it matches.
What should I watch after The Alien Within?
Start with Clayface (2026), the closest match to The Alien Within.
What is the highest-rated movie like The Alien Within?
King Kong (1933), rated 7.6/10 by 1,696 TMDB users.
What is the newest movie like The Alien Within?
Clayface (2026) is the most recent release on this list.
Are there English movies like The Alien Within?
Yes: Clayface (2026), Gigantis, the Fire Monster (1959) and Books of Blood (2020).
How are movies similar to The Alien Within chosen?
First come films that Trakt’s viewers watch alongside The Alien Within, then TMDB’s recommendations and films it rates as similar in story and genre. Each pick says which signal put it there.