Movies Similar to The 27th Day

Communion(1989)

A novelist's wife and son see him changed by an apparent encounter with aliens in the mountains.

The Phantom Planet(1961)

After an asteroid draws an astronaut and his ship to its surface, he is miniaturized by the phantom planet's exotic atmosphere.

3.9

Raging Sharks(2005)

An oceanic observation station is in desperate trouble after a sudden shark attack wrecked the oxygen supply. The accompanying ship, a coast guard cruiser, and other ships in and around the Bermuda triangle are attacked as well. The US Navy sends a submarine to investigate, but soon they too are under attack.

4.6

Snow Devils(1967)

A heroic expedition braves snow-whipped precipices and discovers the dreaded humanoids. But wait – these are extraterrestrial yetis who zipped in from outer space to conquer Earth by melting the polar ice caps with high-energy proton fields. Will mankind be global-warmed into surrender?

3.6

Galaxy of Terror(1981)

As a lone spaceship proceeds on its long voyage across space, the crew are surprised to encounter a strange pyramid form. Surprise turns to horror as one by one, they discover that their darkest nightmares are all starting to become real. The pyramid has to be behind it all somehow, but how can they save themselves from its influence?

5.3

Alien Arsenal(1998)

Alien Arsenal, also released as Alien Weapons, tells the story of two teenage misfits, Ralph and Baxter, who accidentally discover a bizarre vault full of alien weaponry and body armor in the basement of their high school, with which they harness the power to transform from super geeks...to superheroes. Unfortunately, their discovery signals the arsenal's alien owners who have returned to Earth to reclaim the deadly cache...and destroy the planet!

4.3

Dark Mountain(2013)

In March of 2011, three filmmakers disappeared in the Superstition Mountains of Arizona while documenting their search for the Lost Dutchman mine. Their bodies were never found... but their camera was.

4.9

Monster a Go-Go!(1965)

A space capsule crash-lands on Earth, and the astronaut aboard disappears. Is there a connection between the missing man and the monster roaming the area?

2.2

Space Thing(1968)

A man is in bed reading Sci-Fi mags, and his wife seduces him. He then falls asleep, and the rest is his dream. He is from an alternate world, and disguises himself as an alien, then boards their ship, to keep them from attacking his planet. The captain is a woman, who has two lesbian encounters with her crew, and whips one of them for trying to have sex with our hero. All of the women are anxious to seduce our hero, as the other two men on the ship are not very exciting. Our hero forces a landing on an asetroid (actually the outskirts of Palmdale, California) and everyone runs around topless and has sex. He then blows up the alien ship in the worst special effects explosion.

3.8

Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light(1998)

The members of the Super GUTS force, one of whom is secretly Ultraman Dyna, are in the middle of a losing battle against an enormous monster on the surface of the moon, when suddenly a spaceship appears and saves them by zapping the beast. The crew of the ship claim to members of the world peace force that originally created the Super GUTS force, and they invite the GUTS members to enter their brainwave patterns into the ship's battle computer so it can be a more effective fighting system. It sounds like a good idea, but could they have some other plan up their sleeves?

6.3

A.I. Artificial Intelligence(2001)

David, a robotic boy—the first of his kind programmed to love—is adopted as a test case by a Cybertronics employee and his wife. Though he gradually becomes their child, a series of unexpected circumstances make this life impossible for David.

7.0

Aliens(1986)

Ripley, the sole survivor of the Nostromo's deadly encounter with the monstrous Alien, returns to Earth after drifting through space in hypersleep for 57 years. Although her story is initially met with skepticism, she agrees to accompany a team of Colonial Marines back to LV-426.

8.0

Bermuda Tentacles(2014)

After Air Force One goes down during a storm over the Bermuda Triangle, the United States Navy is dispatched to find the escape pod holding the President. A giant monster beneath the ocean awakens and attacks the fleet.

4.0

Alien(1979)

During its return to the earth, commercial spaceship Nostromo intercepts a distress signal from a distant planet. When a three-member team of the crew discovers a chamber containing thousands of eggs on the planet, a creature inside one of the eggs attacks an explorer. The entire crew is unaware of the impending nightmare set to descend upon them when the alien parasite planted inside its unfortunate host is birthed.

8.2

AVP: Alien vs. Predator(2004)

When scientists discover something near Antarctica that appears to be a buried Pyramid, they send a research team out to investigate. Little do they know that they are about to step into a hunting ground where Aliens are grown as sport for the Predator race.

5.9

Aliens vs Predator: Requiem(2007)

After a horrifying PredAlien crash-lands near a small Colorado town, killing everyone it encounters and producing countless Alien offspring, a lone Predator arrives to "clean up" the infestation.

5.2

The Meeting(1984)

An alien decides to find out how much humans actually know about extra-terrestrials. The directorial debut of Mykhailo Titov, a master of chimerical animation of the 80s, is based on the story of the Ukrainian science fiction writer Volodymyr Zayets.

5.0

The Day the Earth Stood Still(1951)

An alien and a robot land on Earth after World War II and tell mankind to be peaceful or face destruction.

7.4

War of the Worlds(2005)

Ray Ferrier is a divorced dockworker and less-than-perfect father. Soon after his ex-wife and her new husband drop off his teenage son and young daughter for a rare weekend visit, a strange and powerful lightning storm touches down.

6.5

Mars Attacks!(1996)

A fleet of Martian spacecraft surrounds the world's major cities and all of humanity waits to see if the extraterrestrial visitors have, as they claim, "come in peace." U.S. President James Dale receives assurance from science professor Donald Kessler that the Martians' mission is a friendly one. But when a peaceful exchange ends in the total annihilation of the U.S. Congress, military men call for a full-scale nuclear retaliation.

6.4