The Best Alien Movies on Showtime

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 stream on a popular subscription service (Showtime) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: Nada, a wanderer without meaning in his life, discovers a pair of sunglasses capable of showing the world the way it truly is. As he walks the streets of Los Angeles, Nada notices that both the media and the government are comprised of subliminal messages meant to keep the population subdued, and that most of the social elite are skull-faced aliens bent on world domination. With this shocking discovery, Nada fights to free humanity from the mind-controlling aliens.

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $3.99 on 8 services (iTunes, Google Play & 6 others).

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 stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: When some very creepy things start happening around school, the kids at Herrington High make a chilling discovery that confirms their worst suspicions: their teachers really are from another planet!

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $1.99 on 7 services (iTunes, Google Play & 5 others).

What it's about: When a freighter is viciously attacked in the Pacific Ocean, a team of experts -- including biologist Niko Tatopoulos and scientists Elsie Chapman and Mendel Craven -- concludes that an oversized reptile is the culprit. Before long, the giant lizard is loose in Manhattan, destroying everything within its reach. The team chases the monster to Madison Square Garden, where a brutal battle ensues.

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: Melanie Ballard is a hard nosed police chief in the year 2025. She and a police snatch squad are sent to Mars to apprehend dangerous criminal James Williams. Mars has been occupied by humans for some time and they have set up mining facilities. The mining activities on Mars have unleashed the spirits of alien beings who gradually possess the bodies of the workers. It soon turns out that catching the dangerous fugitive takes a back seat as the alien spirits begin to rid their planet of the 'invaders'.

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $2.99 on 8 services (iTunes, Google Play & 6 others).

What it's about: Five friends set out to a cabin in the woods for a fun weekend getaway that is, until extraterrestrial visitors turn it into a fight for their lives. The group is pulled from their reverie when a flickering object crashes deep in the woods. As they investigate, the friends stumble across an alien spacecraft, and its inhabitants have not arrived in peace.

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

What it's about: In the sequel to Paul Verhoeven's loved/reviled sci-fi film, a group of troopers taking refuge in an abandoned outpost after fighting alien bugs, failing to realize that more danger lays in wait.

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: In the year 3000, man is no match for the Psychlos, a greedy, manipulative race of aliens on a quest for ultimate profit. Led by the powerful Terl, the Psychlos are stripping Earth clean of its natural resources, using the broken remnants of humanity as slaves. What is left of the human race has descended into a near primitive state. After being captured, it is up to Tyler to save mankind.

Where to Watch: Available to stream on a popular subscription service (Showtime), stream on a popular TV everywhere service (Showtime) & rent or buy from $2.99 on 6 services (iTunes, Google Play & 4 others).

What it's about: In medieval England, Merlin and King Arthur banish the evil enchantress Morgana and her son Mordred to the ends of the universe as Morgana vows revenge. In present day, Knights descendant Penn doesn't take much stock in the legends of his supposed ancestors, even as the descendants meet in Thailand to practice fighting. But when Morgana and her son return to earth, armed with alien technology and hell-bent on destroying every last descendant of King Arthur and his knights, Penn must to come to terms with who he was born to be, and bring together the new Knights of the Round Table to save themselves and the earth from Morgana's total vengeance.

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