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The Best Alien Movies on Free Services

Finding a good Alien movie to watch can be hard, so we've ranked the best ones and included where to watch them. Check out our list of the best Alien movies of all time streaming on Free Services.

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1. Star Trek: First Contact

IMDB LogoIMDB Star
7.6/10
Rotten Tomatoes Logo93%
Reelgood Logo
86/100
Released: 1996Rated: PG-13
Science-Fiction, Action & Adventure

What it's about: The Borg, a relentless race of cyborgs, are on a direct course for Earth. Violating orders to stay away from the battle, Captain Picard and the crew of the newly-commissioned USS Enterprise E pursue the Borg back in time to prevent the invaders from changing Federation history and assimilating the galaxy.

Where to Watch: Available to watch free online (Sony Crackle, PopcornFlix & Tubi), stream on a subscription service (CBS All Access) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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2. Close Encounters of the Third Kind

IMDB LogoIMDB Star
7.6/10
Rotten Tomatoes Logo95%
Reelgood Logo
86/100
Released: 1977Rated: PG
Drama, Science-Fiction

What it's about: After an encounter with UFOs, a line worker feels undeniably drawn to an isolated area in the wilderness where something spectacular is about to happen.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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3. Dark City

IMDB LogoIMDB Star
7.6/10
Rotten Tomatoes Logo76%
Reelgood Logo
83/100
Released: 1998Rated: R
Drama, Fantasy

What it's about: A man struggles with memories of his past, including a wife he cannot remember, in a nightmarish world with no sun and run by beings with telekinetic powers who seek the souls of humans.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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4. Invasion of the Body Snatchers

IMDB LogoIMDB Star
7.7/10
Rotten Tomatoes Logo98%
Reelgood Logo
83/100
Released: 1956
Horror, Science-Fiction

What it's about: A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates.

Where to Watch: Available to watch free online (Sony Crackle & PopcornFlix), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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5. A.I. Artificial Intelligence

IMDB LogoIMDB Star
7.2/10
Rotten Tomatoes Logo74%
Reelgood Logo
82/100
Released: 2001Rated: PG-13
Action & Adventure, Drama

What it's about: 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. Without final acceptance by humans or machines, David embarks on a journey to discover where he truly belongs, uncovering a world in which the line between robot and machine is both vast and profoundly thin.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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6. Starship Troopers

IMDB LogoIMDB Star
7.2/10
Rotten Tomatoes Logo63%
Reelgood Logo
80/100
Released: 1997Rated: R
Action & Adventure, Science-Fiction

What it's about: Set in the future, the story follows a young soldier named Johnny Rico and his exploits in the Mobile Infantry. Rico's military career progresses from recruit to non-commissioned officer and finally to officer against the backdrop of an interstellar war between mankind and an arachnoid species known as "the Bugs".

Where to Watch: Available to watch free online (Vudu & IMDb TV) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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7. Waiting for Guffman

IMDB LogoIMDB Star
7.5/10
Rotten Tomatoes Logo91%
Reelgood Logo
79/100
Released: 1996Rated: R
Comedy, Musical

What it's about: Corky St. Clair is a director, actor and dancer in Blaine, Missouri. When it comes time to celebrate Blaine's 150th anniversary, Corky resolves to bring down the house in Broadway style.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

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8. Attack the Block

IMDB LogoIMDB Star
6.6/10
Rotten Tomatoes Logo90%
Reelgood Logo
79/100
Released: 2011Rated: R
Action & Adventure, Comedy

What it's about: A teen gang in a grim South London housing estate must team up with the other residents to protect their neighbourhood from a terrifying alien invasion.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

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9. Bad Taste

IMDB LogoIMDB Star
6.6/10
Rotten Tomatoes Logo68%
Reelgood Logo
72/100
Released: 1987Rated: R
Comedy, Cult

What it's about: A team from the intergalactic fast food chain Crumb's Crunchy Delights descends on Earth, planning to make human flesh the newest taste sensation. After they wipe out the New Zealand town Kaihoro, the country’s Astro-Investigation and Defense Service (AIaDS) is called in to deal with the problem. Things are complicated due to Giles, an aid worker who comes to Kaihoro the same day to collect change from the residents. He is captured by the aliens, and AIaDS stages a rescue mission that quickly becomes an all-out assault on the aliens’ headquarters.

Where to Watch: Available to watch free online (PopcornFlix & Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $0.99 on 1 service (Prime Video).

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kanopy

10. Explorers

IMDB LogoIMDB Star
6.6/10
Rotten Tomatoes Logo77%
Reelgood Logo
72/100
Released: 1985Rated: PG
Children, Science-Fiction

What it's about: The visionary dreams of three curious and adventuresome young boys become an exciting reality in Explorers, the action-fantasy from director Joe Dante, who combines keen humor, warmth and fantasy with unexpected twists. In their makeshift laboratory, the boys use an amazing discovery and their ingenuity to build their own spaceship and launch themselves on a fantastic interplanetary journey.

Where to Watch: Available to watch free online (Sony Crackle & PopcornFlix), stream on a popular subscription service (Prime Video & Kanopy) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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epix

11. Killer Klowns from Outer Space

IMDB LogoIMDB Star
6.2/10
Rotten Tomatoes Logo77%
Reelgood Logo
69/100
Released: 1988Rated: PG-13
Comedy, Horror

What it's about: Aliens who look like clowns come from outer space and terrorize a small town.

Where to Watch: Available to watch free online (Tubi & IMDb TV), stream on a popular TV everywhere service (Epix) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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12. Bill & Ted's Bogus Journey

IMDB LogoIMDB Star
6.3/10
Rotten Tomatoes Logo54%
Reelgood Logo
69/100
Released: 1991Rated: PG
Action & Adventure, Comedy

What it's about: Amiable slackers Bill and Ted are once again roped into a fantastical adventure when De Nomolos, a villain from the future, sends evil robot duplicates of the two lads to terminate and replace them. The robot doubles actually succeed in killing Bill and Ted, but the two are determined to escape the afterlife, challenging the Grim Reaper to a series of games in order to return to the land of the living.

Where to Watch: Available to watch free online (Vudu & IMDb TV), stream on a popular TV everywhere service (Epix) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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13. The Adventures of Buckaroo Banzai Across the 8th Dimension

IMDB LogoIMDB Star
6.3/10
Rotten Tomatoes Logo69%
Reelgood Logo
68/100
Released: 1984Rated: PG
Action & Adventure, Comedy

What it's about: Adventurer/surgeon/rock musician Buckaroo Banzai and his band of men, the Hong Kong Cavaliers, take on evil alien invaders from the 8th dimension.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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14. The Blob

IMDB LogoIMDB Star
6.5/10
Rotten Tomatoes Logo60%
Reelgood Logo
68/100
Released: 1988Rated: R
Horror, Science-Fiction

What it's about: Remake of the 1958 horror sci-fi about a deadly blob which is the spawn of a secret government germ warfare project which consumes everyone in its path. Teenagers try in vain to warn the townsfolk, who refuse to take them seriously, while government agents try to cover up the evidence and confine the creature.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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15. The Mothman Prophecies

IMDB LogoIMDB Star
6.4/10
Rotten Tomatoes Logo52%
Reelgood Logo
68/100
Released: 2002Rated: PG-13
Drama, Horror

What it's about: Reporter John Klein is plunged into a world of impossible terror and unthinkable chaos when fate draws him to a sleepy West Virginia town whose residents are being visited by a great winged shape that sows hideous nightmares and fevered visions.

Where to Watch: Available to watch free online (Sony Crackle), stream on a subscription service (CBS All Access) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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epix

16. The Arrival

IMDB LogoIMDB Star
6.3/10
Rotten Tomatoes Logo64%
Reelgood Logo
67/100
Released: 1996Rated: PG-13
Action & Adventure, Mystery

What it's about: Zane Ziminski is an astrophysicist who receives a message that seems to have extraterrestrial origins. Eerily soon after his discovery, Zane is fired. He then embarks on a search to determine the origins of the transmission that leads him into a Hitchcockian labyrinth of paranoia and intrigue.

Where to Watch: Available to watch free online (Tubi & Vudu), stream on a popular TV everywhere service (Epix) & rent or buy from $3.99 on 6 services (iTunes, Google Play & 4 others).

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shudder

17. V/H/S/2

IMDB LogoIMDB Star
6.0/10
Rotten Tomatoes Logo70%
Reelgood Logo
67/100
Released: 2013Rated: R
Horror, Thriller

What it's about: Inside a darkened house looms a column of TVs littered with VHS tapes, a pagan shrine to forgotten analog gods. The screens crackle and pop endlessly with monochrome vistas of static white noise permeating the brain and fogging concentration. But you must fight the urge to relax: this is no mere movie night. Those obsolete spools contain more than just magnetic tape. They are imprinted with the very soul of evil.

Where to Watch: Available to watch free online (Tubi), stream on a subscription service (Monsters Nightmares & Shudder) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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epix

18. Airplane II: The Sequel

IMDB LogoIMDB Star
6.2/10
Rotten Tomatoes Logo42%
Reelgood Logo
65/100
Released: 1982Rated: PG
Comedy, Science-Fiction

What it's about: A faulty computer causes a passenger space shuttle to head straight for the sun, and man-with-a-past, Ted Striker must save the day and get the shuttle back on track – again – all the while trying to patch up his relationship with Elaine.

Where to Watch: Available to watch free online (Sony Crackle & PopcornFlix), stream on a popular subscription service (Prime Video), stream on a popular TV everywhere service (Epix) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

poster
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19. Final Fantasy: The Spirits Within

IMDB LogoIMDB Star
6.4/10
Rotten Tomatoes Logo45%
Reelgood Logo
65/100
Released: 2001Rated: PG-13
Animation, Action & Adventure

What it's about: Led by a strange dream, scientist Aki Ross struggles to collect the eight spirits in the hope of creating a force powerful enough to protect the planet. With the aid of the Deep Eyes Squadron and her mentor, Dr. Sid, Aki must save the Earth from its darkest hate and unleash the spirits within.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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20. 20 Million Miles to Earth

IMDB LogoIMDB Star
6.4/10
Rotten Tomatoes Logo80%
Reelgood Logo
64/100
Released: 1957
Science-Fiction, Action & Adventure

What it's about: When the first manned flight to Venus returns to Earth, the rocket crash-lands in the Mediterranean near a small Italian fishing village. The locals manage to save one of the astronauts Colonel Calder, the mission commander. A young boy also recovers what turns out to be a specimen of an alien creature. Growing at a fantastic rate, it manages to escape and eventually threatens the city of Rome.

Where to Watch: Available to watch free online (Tubi) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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21. Species

IMDB LogoIMDB Star
5.8/10
Rotten Tomatoes Logo43%
Reelgood Logo
64/100
Released: 1995Rated: R
Horror, Science-Fiction

What it's about: In 1993, the Search for Extra Terrestrial Intelligence Project receives a transmission detailing an alien DNA structure, along with instructions on how to splice it with human DNA. The result is Sil, a sensual but deadly creature who can change from a beautiful woman to an armour-plated killing machine in the blink of an eye.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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22. Alien Raiders

IMDB LogoIMDB Star
5.6/10
Rotten Tomatoes Logo100%
Reelgood Logo
63/100
Released: 2008Rated: R
Action & Adventure, Horror

What it's about: It's the end of yet another night at Hastings Supermarket, a grocery store in Buck Lake, Arizona. But just before closing, a group of masked and armed to the teeth militants invades the store and take everyone hostage

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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23. The Day of the Triffids

IMDB LogoIMDB Star
6.2/10
Rotten Tomatoes Logo76%
Reelgood Logo
62/100
Released: 1962
Horror, Science-Fiction

What it's about: A shower of meteorites produces a rare night time spectacle that blinds anyone that looks at it. As it was such a beautiful sight, most people were watching, and as a consequence, 99% of the World's population go completely blind. In the original novel, this chaos results in the escape of Triffids: farmed plants harvested for their oils, which are capable of moving themselves around and are carnivorous. In this film version, however, the Triffids are not indigenous plants. Instead they are space aliens whose spores have arrived in this and an earlier meteor shower. Derided by the original novel's author, John Wyndham, for straying so far away from the source material.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $0.99 on 1 service (Prime Video).

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24. Alien Autopsy

IMDB LogoIMDB Star
5.8/10
Rotten Tomatoes Logo75%
Reelgood Logo
62/100
Released: 2006Rated: PG-13
Comedy, Science-Fiction

What it's about: Humouristic reconstruction of the 1995 scandal when two British lads were accused of having faked a documentary from the Roswell incident in 1947.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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fandor
cont
+ 2

25. Horror Express

IMDB LogoIMDB Star
6.5/10
Rotten Tomatoes Logo67%
Reelgood Logo
61/100
Released: 1972Rated: R
Horror, Science-Fiction

What it's about: Mysterious and unearthly deaths start to occur while Professor Saxton is transporting the frozen remains of a primitive humanoid creature he found in Manchuria back to Europe.

Where to Watch: Available to watch free online (PopcornFlix & Tubi), stream on a subscription service (Fandor, ConTV, Secrets of Cinema & 1 other) & rent or buy from $1.99 on 3 services (iTunes, Google Play & Microsoft).

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26. I Sell The Dead

IMDB LogoIMDB Star
6.1/10
Rotten Tomatoes Logo73%
Reelgood Logo
60/100
Released: 2008
Comedy, Horror

What it's about: 18th century justice catches up with a pair of grave robbers. With only a few hours to go before his date with the guillotine, Arthur Blake (Monaghan) tells his life story to Father Francis Duffy (Ron Perlman). Before long, Arthur spills the beans on how he got started in the grim corpse peddling business with seasoned ghoul Willie Grimes.

Where to Watch: Available to watch free online (PopcornFlix) & rent or buy from $3.99 on 1 service (iTunes).

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abc_family

27. Escape from Planet Earth

IMDB LogoIMDB Star
5.9/10
Rotten Tomatoes Logo35%
Reelgood Logo
60/100
Released: 2013Rated: PG
Animation, Action & Adventure

What it's about: Astronaut Scorch Supernova finds himself caught in a trap when he responds to an SOS from a notoriously dangerous alien planet.

Where to Watch: Available to watch free online (IMDb TV), stream on a TV everywhere service (Freeform) & rent or buy from $2.99 on 5 services (iTunes, Prime Video & 3 others).

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28. Krull

IMDB LogoIMDB Star
6.1/10
Rotten Tomatoes Logo32%
Reelgood Logo
60/100
Released: 1983Rated: PG
Action & Adventure, Cult

What it's about: A prince and a fellowship of companions set out to rescue his bride from a fortress of alien invaders who have arrived on their home planet.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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29. Imitation Girl

IMDB LogoIMDB Star
4.8/10
Rotten Tomatoes Logo100%
Reelgood Logo
60/100
Released: 2017
Drama, Science-Fiction

What it's about: A mysterious young woman materializes in the middle of the southwestern desert, where each step teaches her about her new world and her new body. As she assumes her new life, she discovers she has a twin with whom she shares more than just an outward appearance.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

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fandor
+ 3

30. Plan 9 from Outer Space

IMDB LogoIMDB Star
4.0/10
Rotten Tomatoes Logo67%
Reelgood Logo
58/100
Released: 1959
Horror, Cult

What it's about: In California, an old man grieves the loss of his wife and on the next day he also dies. However, the space soldier Eros and her mate Tanna use an electric device to resurrect them both and the strong Inspector Clay that was murdered by the couple. Their intention is not to conquest Earth but to stop mankind from developing the powerful bomb “Solobonite” that would threaten the universe. When the population of Hollywood and Washington DC sees flying saucers on the sky, a colonel, a police lieutenant, a commercial pilot, his wife and a policeman try to stop the aliens.

Where to Watch: Available to watch free online (PopcornFlix, SnagFilms & Tubi), stream on a popular subscription service (Prime Video, Fandor, FilmBox & 2 others) & rent or buy from $2.00 on 5 services (iTunes, Google Play & 3 others).

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31. The Visitor

IMDB LogoIMDB Star
5.2/10
Rotten Tomatoes Logo82%
Reelgood Logo
58/100
Released: 1979Rated: R
Horror, Cult

What it's about: An ancient intergalactic warrior arrives on Earth to put a stop to a demonic child's plot to reproduce Satan's next generation of evil.

Where to Watch: Available to watch free online (PopcornFlix, Tubi & Vudu) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

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32. Absolutely Anything

IMDB LogoIMDB Star
6.0/10
Rotten Tomatoes Logo18%
Reelgood Logo
57/100
Released: 2015Rated: R
Comedy, Science-Fiction

What it's about: Eccentric aliens give a man the power to do anything he wants to determine if Earth is worth saving.

Where to Watch: Available to watch free online (Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 7 services (iTunes, Google Play & 5 others).

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33. Battle Beyond the Stars

IMDB LogoIMDB Star
5.6/10
Rotten Tomatoes Logo45%
Reelgood Logo
56/100
Released: 1980Rated: PG
Action & Adventure, Comedy

What it's about: A young farmer assembles a band of diverse mercenaries to defend his peaceful planet from an evil tyrant.

Where to Watch: Available to watch free online (Tubi & Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

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34. Critters 2

IMDB LogoIMDB Star
5.5/10
Rotten Tomatoes Logo27%
Reelgood Logo
52/100
Released: 1988Rated: PG-13
Comedy, Horror

What it's about: A batch of unhatched critter eggs are mistaken for Easter eggs by the country-folk inhabitants of Grover's Bend and, before long, the ferocious furballs are on the rampage again.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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35. Freaks of Nature

IMDB LogoIMDB Star
5.9/10
Rotten Tomatoes LogoN/A
Reelgood Logo
52/100
Released: 2015Rated: R
Comedy, Horror

What it's about: In the town of Dillford, humans, vampires and zombies were all living in peace - until the alien apocalypse arrived. Now three teenagers-one human, one vampire, and one zombie-have to team up to figure out how to get rid of the visitors.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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kanopy

36. 1981

IMDB LogoIMDB Star
7.2/10
Rotten Tomatoes LogoN/A
Reelgood Logo
52/100
Released: 2009
Comedy, Independent

What it's about: Filmmaker Ricardo Trogi recalls the events surrounding his family moving to a new neighborhood when he was 11-years-old.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video & Kanopy) & rent or buy from $3.99 on 1 service (Prime Video).

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37. Dead Space: Downfall

IMDB LogoIMDB Star
6.3/10
Rotten Tomatoes LogoN/A
Reelgood Logo
52/100
Released: 2008
Animation, Horror

What it's about: On a deep space mining mission to a remote planet, an ancient religious relic - thought to be proof of the existence of God - is unearthed and brought aboard. When the unholy artifact unleashes a long-dormant alien race, its glimpse of Heaven transforms the ship into a living Hell. A prequel to the events of the 2008 video game Dead Space.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $3.99 on 4 services (iTunes, Prime Video & 2 others).

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38. The Astronaut's Wife

IMDB LogoIMDB Star
5.4/10
Rotten Tomatoes Logo15%
Reelgood Logo
51/100
Released: 1999Rated: R
Drama, Science-Fiction

What it's about: When astronaut Spencer Armacost returns to Earth after a mission that nearly cost him his life, he decides to take a desk job in order to see his beautiful wife, Jillian, more often. Gradually, Jillian notices that Spencer's personality seems to have changed, but her concerns fade when she discovers that she's pregnant. As Jillian grows closer to becoming a mother, her suspicions about Spencer return. Why does it seem as if he's a different person?

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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39. Godzilla 2000: Millennium

IMDB LogoIMDB Star
6.1/10
Rotten Tomatoes Logo43%
Reelgood Logo
51/100
Released: 1999Rated: PG
Action & Adventure, Drama

What it's about: An independent group of researchers called the Godzilla Prediction Network (GPN) actively track Godzilla as he makes landfall in Nemuro. Matters are further complicated when a giant meteor is discovered in the Ibaragi Prefecture. The mysterious rock begins to levitate as it's true intentions for the world and Godzilla are revealed.

Where to Watch: Available to watch free online (Sony Crackle), stream on a subscription service (CBS All Access) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

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40. My Stepmother is an Alien

IMDB LogoIMDB Star
5.3/10
Rotten Tomatoes Logo19%
Reelgood Logo
51/100
Released: 1988Rated: PG-13
Comedy, Romance

What it's about: Trying to rescue her home planet from destruction, a gorgeous extraterrestrial named Celeste arrives on Earth and begins her scientific research. She woos quirky scientist Dr. Steve Mills, a widower with a young daughter. Before long, Celeste finds herself in love with Steve and her new life on Earth, where she experiences true intimacy for the first time. But when she loses sight of her mission, she begins to question where she belongs.

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

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41. What Planet Are You From?

IMDB LogoIMDB Star
5.6/10
Rotten Tomatoes Logo42%
Reelgood Logo
49/100
Released: 2000Rated: R
Comedy, Science-Fiction

What it's about: A highly-evolved planet, whose denizens feel no emotion and reproduce by cloning, plans to take over Earth from the inside by sending an operative, fashioned with a humming, mechanical penis, to impregnate an earthling and stay until the birth. The alien, Harold Anderson, goes to Phoenix as a banker and sets to work finding a mate. His approaches to women are inept, and the humming phallus doesn't help, but on the advice of a banking colleague, he cruises an AA meeting, meets Susan, and somehow convinces her to marry. The clock starts to tick: will she conceive, have a baby, and lose Harold (and the child) to his planet before he discovers emotion and starts to care?

Where to Watch: Available to watch free online (Sony Crackle) & rent or buy from $2.99 on 4 services (iTunes, Google Play & 2 others).

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42. Alien Trespass

IMDB LogoIMDB Star
5.6/10
Rotten Tomatoes Logo36%
Reelgood Logo
48/100
Released: 2009Rated: PG
Comedy, Horror

What it's about: In 1957 a fiery object crashes into a mountaintop in the California desert, bringing the threat of disaster to Earth. Out of the flying saucer escapes a murderous creature, the Ghota, bent on destroying all life forms on the planet. A benevolent alien from the spaceship, Urp, inhabits the body of Ted Lewis, an astronomer and with the help of Tammy, a diner waitress, sets out to save mankind.

Where to Watch: Available to watch free online (Tubi & Vudu), stream on a popular subscription service (Prime Video) & rent or buy from $0.99 on 1 service (Prime Video).

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43. The Sand

IMDB LogoIMDB Star
3.8/10
Rotten Tomatoes Logo40%
Reelgood Logo
48/100
Released: 2015
Horror, Science-Fiction

What it's about: Just when you thought it was safe to go back in the water again, you can’t even get across the sand! BLOOD BEACH meets SPRING BREAKERS in an ace monster mash-up of smart nostalgia and up-to-the-minute visual effects. After an all-night graduation beach party, a group of hung-over students wake up under blazing sun to find their numbers somewhat depleted. An enormous alien creature has burrowed down deep and anyone foolish enough to make contact with the sand finds themselves at the mercy of a sea of flesh-eating tentacles. Will they ever be able to escape its carnivorous clutches?

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video) & rent or buy from $2.99 on 5 services (iTunes, Google Play & 3 others).

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44. Species II

IMDB LogoIMDB Star
4.4/10
Rotten Tomatoes Logo9%
Reelgood Logo
48/100
Released: 1998Rated: R
Horror, Science-Fiction

What it's about: Having just returned from a mission to Mars, Commander Ross isn't exactly himself. He's slowly becoming a terrifying alien entity with one goal -- to procreate with human women! When countless women suffer gruesome deaths after bearing half-alien offspring, scientist Laura Baker and hired assassin Press Lennox use Eve, a more tempered alien clone, to find Ross and his brood. Before long Eve escapes to mate with Ross.

Where to Watch: Available to watch free online (Tubi & Vudu) & rent or buy from $3.99 on 4 services (iTunes, Prime Video & 2 others).

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45. Invasion of the Bee Girls

IMDB LogoIMDB Star
5.0/10
Rotten Tomatoes Logo43%
Reelgood Logo
48/100
Released: 1973Rated: R
Horror, Mystery

What it's about: Neil Agar, a security agent with the State Department, is dispatched to Peckham, California to investigate the death of a bacteriologist working at government-sponsored Brandt Research. His investigation is soon complicated by a growing number of deaths, all men who died of congestive heart failure caused by sexual exhaustion.

Where to Watch: Available to watch free online (Tubi), stream on a popular subscription service (Prime Video), stream on a popular TV everywhere service (Epix) & rent or buy from $3.99 on 1 service (Prime Video).

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46. Guyver: Dark Hero

IMDB LogoIMDB Star
6.0/10
Rotten Tomatoes LogoN/A
Reelgood Logo
48/100
Released: 1994Rated: R
Action & Adventure, Science-Fiction

What it's about: Sean Barker became the unwilling host to an alien bio-armor known as the Guyver. A year ago he destroyed the Kronos Corporation, an organization of mutants who want the Guyver. Now he is trying to find why the Guyver unit forces him to fight and kill evil.

Where to Watch: Available to watch free online (Vudu) & rent or buy from $2.99 on 4 services (iTunes, Prime Video & 2 others).

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47. Mars

IMDB LogoIMDB Star
6.0/10
Rotten Tomatoes Logo86%
Reelgood Logo
47/100
Released: 2010
Animation, Comedy

What it's about: A new space race is born between NASA and the ESA when Charlie Brownsville, Hank Morrison, and Dr. Casey Cook compete against an artificially intelligent robot to find out what's up there on the red planet. 'Mars' follows these three astronauts on the first manned mission to our galactic neighbor. On the way they experience life threatening accidents, self doubts, obnoxious reporters, and the boredom of extended space travel.

Where to Watch: Available to watch free online (Tubi & Vudu), stream on a subscription service (Fandor & Kanopy) & rent or buy from $0.99 on 2 services (iTunes & Google Play).

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48. Highlander 2: The Quickening

IMDB LogoIMDB Star
4.3/10
Rotten Tomatoes LogoN/A
Reelgood Logo
47/100
Released: 1991Rated: R
Action & Adventure, Comedy

What it's about: In the year 2025, the ozone layer is believed to have been destroyed. It is up to MacLeod and Rameriz to set things right. Opposition comes from both the planet Ziest (MacLeod and Ramirez's homeworld) and a corporation profiting from the supposed lack of ozone. Also, flashbacks show the story behind MacLeod and Ramirez's exile from Ziest.

Where to Watch: Available to watch free online (Tubi & Vudu).

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49. Robotech: The Shadow Chronicles

IMDB LogoIMDB Star
6.5/10