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The Best Alien TV Shows

Finding a good Alien TV show 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 TV shows of all time streaming online.

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1. Rick and Morty

IMDB LogoIMDB Star
9.2/10
Reelgood Logo
95/100
Year: 2013-2021Rated: TV-MASeasons: 4
Animation, Comedy

What it's about: Rick is a mentally-unbalanced but scientifically-gifted old man who has recently reconnected with his family. He spends most of his time involving his young grandson Morty in dangerous, outlandish adventures throughout space and alternate universes. Compounded with Morty's already unstable family life, these events cause Morty much distress at home and school.

Where to Watch: 5 episodes (12%) are available to watch free online (Adult Swim). 42 episodes (100%) are available to stream on a popular subscription service (HBO MAX, Hulu, fuboTV & 2 others). 5 episodes (12%) are available to stream on a TV everywhere service (Adult Swim). 41 episodes (98%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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2. Futurama

IMDB LogoIMDB Star
8.4/10
Reelgood Logo
88/100
Year: 1999-2021Rated: TV-14Seasons: 11
Science-Fiction, Animation

What it's about: The adventures of a late-20th-century New York City pizza delivery boy, Philip J. Fry, who, after being unwittingly cryogenically frozen for one thousand years, finds employment at Planet Express, an interplanetary delivery company in the retro-futuristic 31st century.

Where to Watch: 137 episodes (96%) are available to stream on a popular subscription service (Hulu, fuboTV & TVision). 7 episodes (5%) are available to stream on a popular TV everywhere service (Syfy & Comedy Central). 142 episodes (100%) are available to rent or buy from $0.99 on 6 services (iTunes, Google Play & 4 others).

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3. The X-Files

IMDB LogoIMDB Star
8.6/10
Reelgood Logo
87/100
Year: 1993-2021Rated: TV-14Seasons: 11
Drama, Science-Fiction

What it's about: The exploits of FBI Special Agents Fox Mulder and Dana Scully who investigate X-Files: marginalized, unsolved cases involving paranormal phenomena. Mulder believes in the existence of aliens and the paranormal while Scully, a skeptic, is assigned to make scientific analyses of Mulder's discoveries that debunk Mulder's work and thus return him to mainstream cases.

Where to Watch: 3 episodes (1%) are available to watch free online (FOX). 218 episodes (100%) are available to stream on a popular subscription service (Hulu, Philo & fuboTV). 20 episodes (9%) are available to stream on a TV everywhere service (BBC America). 219 episodes (100%) are available to rent or buy from $1.99 on 7 services (iTunes, Google Play & 5 others).

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4. Star Trek: The Next Generation

IMDB LogoIMDB Star
8.6/10
Reelgood Logo
86/100
Year: 1987-2021Rated: TV-PGSeasons: 7
Action & Adventure, Drama

What it's about: Follow the intergalactic adventures of Capt. Jean-Luc Picard and his loyal crew aboard the all-new USS Enterprise NCC-1701D, as they explore new worlds.

Where to Watch: 177 episodes (98%) are available to stream on a popular subscription service (Netflix, Hulu & 1 other). 180 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play, Prime Video & 3 others).

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5. Doctor Who

IMDB LogoIMDB Star
8.6/10
Reelgood Logo
86/100
Year: 2005-2021Rated: TV-PGSeasons: 13
Action & Adventure, Drama

What it's about: The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor's very, very good at it.

Where to Watch: 148 episodes (97%) are available to stream on a popular subscription service (HBO MAX & fuboTV). 10 episodes (7%) are available to stream on a TV everywhere service (BBC America). 152 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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6. Star Trek: Discovery

IMDB LogoIMDB Star
7.2/10
Reelgood Logo
83/100
Year: 2017-2021Rated: TV-14Seasons: 3
Science-Fiction, Action & Adventure

What it's about: Follow the voyages of Starfleet on their missions to discover new worlds and new life forms, and one Starfleet officer who must learn that to truly understand all things alien, you must first understand yourself.

Where to Watch: 42 episodes (100%) are available to stream on a subscription service (fuboTV & CBS All Access). 29 episodes (69%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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7. One-Punch Man

IMDB LogoIMDB Star
8.8/10
Reelgood Logo
82/100
Year: 2015-2021Rated: TV-14Seasons: 2
Animation, Anime

What it's about: Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he’s become so strong that he’s practically invincible. In fact, he’s too strong—even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?

Where to Watch: 15 episodes (60%) are available to watch free online (Tubi, PlutoTV, Crunchyroll & 1 other). 24 episodes (96%) are available to stream on a popular subscription service (Netflix, Hulu & Funimation). 9 episodes (36%) are available to stream on a TV everywhere service (Adult Swim). 25 episodes (100%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play, Vudu & 1 other). Episodes coming soon to Hulu on January 19th, 2021 (PST).

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8. Battlestar Galactica

IMDB LogoIMDB Star
8.7/10
Reelgood Logo
82/100
Year: 2004-2021Rated: TV-14Seasons: 4
Action & Adventure, Fantasy

What it's about: When an old enemy, the Cylons, resurface and obliterate the 12 colonies, the crew of the aged Galactica protect a small civilian fleet - the last of humanity - as they journey toward the fabled 13th colony, Earth.

Where to Watch: 74 episodes (100%) are available to watch free online (Peacock). 73 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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9. Star Trek

IMDB LogoIMDB Star
8.3/10
Reelgood Logo
82/100
Year: 1966-2021Rated: TV-PGSeasons: 3
Action & Adventure, Drama

What it's about: Space. The Final Frontier. The U.S.S. Enterprise embarks on a five year mission to explore the galaxy. The Enterprise is under the command of Captain James T. Kirk with First Officer Mr. Spock, from the planet Vulcan. With a determined crew, the Enterprise encounters Klingons, Romulans, time paradoxes, tribbles and genetic supermen lead by Khan Noonian Singh. Their mission is to explore strange new worlds, to seek new life and new civilizations, and to boldly go where no man has gone before.

Where to Watch: 79 episodes (100%) are available to stream on a popular subscription service (Netflix, Hulu & 1 other). 79 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play, Prime Video & 3 others).

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10. Star Trek: Deep Space Nine

IMDB LogoIMDB Star
8.0/10
Reelgood Logo
81/100
Year: 1993-2021Rated: TV-PGSeasons: 7
Action & Adventure, Drama

What it's about: At Deep Space Nine, a space station located next to a wormhole in the vicinity of the liberated planet of Bajor, Commander Sisko and crew welcome alien visitors, root out evildoers and solve all types of unexpected problems that come their way.

Where to Watch: 173 episodes (97%) are available to stream on a popular subscription service (Netflix, Hulu & 3 others). 10 episodes (6%) are available to stream on a TV everywhere service (BBC America). 179 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play, Prime Video & 3 others).

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11. Smallville

IMDB LogoIMDB Star
7.5/10
Reelgood Logo
80/100
Year: 2001-2021Rated: TV-PGSeasons: 11
Action & Adventure, Drama

What it's about: The origins of the world’s greatest hero–from Krypton refugee Kal-el’s arrival on Earth through his tumultuous teen years to Clark Kent’s final steps toward embracing his destiny as the Man of Steel.

Where to Watch: 218 episodes (98%) are available to stream on a popular subscription service (Hulu). 219 episodes (98%) are available to rent or buy from $0.99 on 6 services (iTunes, Google Play & 4 others).

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+ 1

12. Stargate SG-1

IMDB LogoIMDB Star
8.4/10
Reelgood Logo
80/100
Year: 1997-2021Seasons: 10
Action & Adventure, Fantasy

What it's about: The story of Stargate SG-1 begins about a year after the events of the feature film, when the United States government learns that an ancient alien device called the Stargate can access a network of such devices on a multitude of planets. SG-1 is an elite Air Force special operations team, one of more than two dozen teams from Earth who explore the galaxy and defend against alien threats such as the Goa'uld, Replicators, and the Ori.

Where to Watch: 215 episodes (100%) are available to stream on a popular subscription service (Netflix, Prime Video, Hulu & 1 other). 213 episodes (99%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

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13. Farscape

IMDB LogoIMDB Star
8.2/10
Reelgood Logo
79/100
Year: 1999-2021Rated: TV-14Seasons: 5
Science-Fiction, Action & Adventure

What it's about: A freak accident during an experimental space mission catapults Astronaut John Crichton across a thousand galaxies to an alien battlefield.

Where to Watch: 2 episodes (2%) are available to stream on a popular subscription service (Prime Video). 88 episodes (98%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

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14. Star Trek: Voyager

IMDB LogoIMDB Star
7.8/10
Reelgood Logo
79/100
Year: 1995-2021Rated: TV-PGSeasons: 7
Action & Adventure, Drama

What it's about: Pulled to the far side of the galaxy, where the Federation is 75 years away at maximum warp speed, a Starfleet ship must cooperate with Maquis rebels to find a way home.

Where to Watch: 169 episodes (97%) are available to stream on a popular subscription service (Netflix, Hulu & 1 other). 174 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play, Prime Video & 3 others).

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hoopla

15. Falling Skies

IMDB LogoIMDB Star
7.2/10
Reelgood Logo
79/100
Year: 2011-2021Rated: TV-14Seasons: 5
Action & Adventure, Science-Fiction

What it's about: Falling Skies opens in the chaotic aftermath of an alien attack that has left most of the world completely incapacitated. In the six months since the initial invasion, the few survivors have banded together outside major cities to begin the difficult task of fighting back. Each day is a test of survival as citizen soldiers work to protect the people in their care while also engaging in an insurgency campaign against the occupying alien force.

Where to Watch: 52 episodes (100%) are available to stream on a popular subscription service (HBO MAX & Hoopla). 52 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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16. Dragon Ball Z

IMDB LogoIMDB Star
8.7/10
Reelgood Logo
78/100
Year: 1989-2021Rated: TV-PGSeasons: 9
Action & Adventure, Anime

What it's about: Five years have passed since the fight with Piccolo Jr., and Goku now has a son, Gohan. The peace is interrupted when an alien named Raditz arrives on Earth in a spacecraft and tracks down Goku, revealing to him that that they are members of a near-extinct warrior race called the Saiyans.

Where to Watch: 291 episodes (100%) are available to stream on a subscription service (Funimation). 165 episodes (57%) are available to rent or buy from $1.99 on 1 service (Prime Video).

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17. Stargate Atlantis

IMDB LogoIMDB Star
8.1/10
Reelgood Logo
76/100
Year: 2004-2021Rated: TV-PGSeasons: 5
Action & Adventure, Science-Fiction

What it's about: With the Ancients' city of Atlantis discovered in the Pegasus Galaxy by Stargate Command, Dr. Elizabeth Weir and Major Sheppard lead a scientific expedition to the ancient abandoned city. Once there, the team not only find themselves unable to contact Earth, but their explorations unexpectedly reawaken the Ancients' deadly enemies, The Wraith, who hunger for this new prey. Now with the help of newfound local allies like Teyla Emmagan, the Atlantis Team sets about to uncover their new home's secrets even as their war of survival against the Wraith begins.

Where to Watch: 101 episodes (100%) are available to stream on a popular subscription service (Prime Video & Hulu). 101 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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TV
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free
britbox
plutotv

18. Doctor Who

IMDB LogoIMDB Star
8.4/10
Reelgood Logo
76/100
Year: 1963-2021Rated: TV-PGSeasons: 27
Action & Adventure, Science-Fiction

What it's about: The adventures of a Time Lord—a time-travelling humanoid alien known as the Doctor—who explores the universe in his TARDIS, a sentient time-travelling space ship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Along with a succession of companions, the Doctor faces a variety of foes while working to save civilisations, help ordinary people, and right wrongs.

Where to Watch: 52 episodes (7%) are available to watch free online (PlutoTV). 594 episodes (82%) are available to stream on a subscription service (BritBox). 382 episodes (53%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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19. Star Trek: Enterprise

IMDB LogoIMDB Star
7.5/10
Reelgood Logo
76/100
Year: 2001-2021Rated: TV-PGSeasons: 4
Action & Adventure, Drama

What it's about: During the mid-22nd century, a century before Captain Kirk's five-year mission, Jonathan Archer captains the United Earth ship Enterprise during the early years of Starfleet, leading up to the Earth-Romulan War and the formation of the Federation.

Where to Watch: 98 episodes (99%) are available to stream on a popular subscription service (Netflix, Hulu & 1 other). 99 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play, Prime Video & 3 others).

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20. Stargate Universe

IMDB LogoIMDB Star
7.6/10
Reelgood Logo
75/100
Year: 2009-2021Rated: TV-14Seasons: 2
Action & Adventure, Science-Fiction

What it's about: The adventures of a present-day, multinational exploration team traveling on the Ancient spaceship Destiny many billions of light years distant from the Milky Way Galaxy. They evacuated there and are now trying to figure out a way to return to Earth, while simultaneously trying to explore and to survive in their unknown area of the universe.

Where to Watch: 5 episodes (13%) are available to stream on a popular subscription service (Hulu). 40 episodes (100%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

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21. Dragon Ball

IMDB LogoIMDB Star
8.5/10
Reelgood Logo
74/100
Year: 1996-2021Rated: TV-14Seasons: 10
Action & Adventure, Anime

What it's about: Long ago in the mountains, a fighting master known as Gohan discovered a strange boy whom he named Goku. Gohan raised him and trained Goku in martial arts until he died. The young and very strong boy was on his own, but easily managed. Then one day, Goku met a teenage girl named Bulma, whose search for the mystical Dragon Balls brought her to Goku's home. Together, they set off to find all seven and to grant her wish.

Where to Watch: 161 episodes (65%) are available to stream on a popular subscription service (Hulu & Funimation). 151 episodes (61%) are available to rent or buy from $1.99 on 1 service (Prime Video).

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nbc

22. Caprica

IMDB LogoIMDB Star
7.1/10
Reelgood Logo
73/100
Year: 2010-2021Rated: TV-14Seasons: 1
Drama, Science-Fiction

What it's about: Set 58 years before Battlestar Galactica, Caprica follows two rival families - the Graystones and the Adamas - as they grow, compete, and thrive in the vibrant world of the peaceful 12 Colonies, living in a society close to our own. Entangled in the burgeoning technology of artificial intelligence and robotics that will eventually lead to the creation of the Cylons, the two houses go toe-to-toe, blending action with corporate conspiracy and sexual politics.

Where to Watch: 17 episodes (85%) are available to watch free online (NBC). 20 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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free
cbs_all_access
plutotv
+ 1

23. BrainDead

IMDB LogoIMDB Star
8.1/10
Reelgood Logo
73/100
Year: 2016-2021Rated: TV-14Seasons: 1
Drama, Horror

What it's about: A young fresh-faced Hill staffer gets her first job in Washington, D.C. and discovering two things: 1. The government has stopped working, and 2. alien spawn have come to earth and eaten the brains of a growing number of Congressmen and Hill staffers.

Where to Watch: 13 episodes (100%) are available to watch free online (PlutoTV & CW Seed). 13 episodes (100%) are available to stream on a subscription service (CBS All Access). 13 episodes (100%) are available to rent or buy from $1.99 on 1 service (Prime Video).

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24. Justice League

IMDB LogoIMDB Star
8.5/10
Reelgood Logo
73/100
Year: 2001-2021Rated: TV-PGSeasons: 5
Action & Adventure, Animation

What it's about: The long-awaited rebirth of the greatest superhero team of all time: Batman, Superman, The Flash, Wonder Woman, Hawkgirl, Green Lantern and Martian Manhunter.

Where to Watch: 91 episodes (99%) are available to stream on a subscription service (DC Universe). 92 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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25. Torchwood

IMDB LogoIMDB Star
7.7/10
Reelgood Logo
72/100
Year: 2006-2021Rated: TV-MASeasons: 6
Action & Adventure, Crime

What it's about: The exploits a team of people whose job is to investigate the unusual, the strange and the extraterrestrial.

Where to Watch: 41 episodes (100%) are available to stream on a popular subscription service (HBO MAX). 41 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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26. Defiance

IMDB LogoIMDB Star
7.0/10
Reelgood Logo
72/100
Year: 2013-2021Rated: TV-MASeasons: 4
Action & Adventure, Drama

What it's about: In the near future, planet Earth is permanently altered following the sudden—and tumultuous—arrival of seven unique alien races. In the boom-town of Defiance, the newly-formed civilization of humans and aliens must learn to co-exist peacefully.

Where to Watch: 39 episodes (100%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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27. Solar Opposites

IMDB LogoIMDB Star
8.0/10
Reelgood Logo
71/100
Year: 2020-2021Rated: TV-MASeasons: 2
Animation, Comedy

What it's about: A family of aliens from a much better world must take refuge in middle America after the destruction of their planet. Their mission: protect the Pupa, a living super computer that will one day evolve into its true form, consume them and terraform the Earth.

Where to Watch: 8 episodes (100%) are available to stream on a popular subscription service (Hulu). 8 episodes (100%) are available to rent or buy from $1.99 on 1 service (Vudu).

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28. Green Lantern: The Animated Series

IMDB LogoIMDB Star
8.0/10
Reelgood Logo
71/100
Year: 2011-2021Rated: TV-PGSeasons: 1
Action & Adventure, Animation

What it's about: The Green Lanterns Hal and his partner Kilowog fight against the forces of the Red Lanterns.

Where to Watch: 26 episodes (96%) are available to stream on a popular subscription service (HBO MAX). 25 episodes (93%) are available to rent or buy from $0.99 on 5 services (iTunes, Google Play & 3 others).

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29. Red Dwarf

IMDB LogoIMDB Star
8.4/10
Reelgood Logo
71/100
Year: 1989-2021Rated: TV-14Seasons: 13
Comedy, Science-Fiction

What it's about: The adventures of the last human alive and his friends, stranded three million years into deep space on the mining ship Red Dwarf.

Where to Watch: 74 episodes (99%) are available to stream on a subscription service (BritBox). 74 episodes (99%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play & 4 others).

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30. Parasyte -the maxim-

IMDB LogoIMDB Star
8.3/10
Reelgood Logo
71/100
Year: 2014-2021Rated: TV-MASeasons: 1
Action & Adventure, Anime

What it's about: All of a sudden, they arrived: parasitic aliens that descended upon Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings acquire full control of their host and are able to morph into a variety of forms in order to feed on unsuspecting prey. Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain, ending up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi in order to stay alive. Thus, the pair is forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to eradicate this new threat to their species.

Where to Watch: 24 episodes (86%) are available to watch free online (Crunchyroll). 28 episodes (100%) are available to stream on a popular subscription service (Netflix & Hulu). 28 episodes (100%) are available to rent or buy from $1.99 on 3 services (iTunes, Prime Video & Vudu).

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31. Krypton

IMDB LogoIMDB Star
6.9/10
Reelgood Logo
71/100
Year: 2018-2021Rated: TV-14Seasons: 2
Action & Adventure, Science-Fiction

What it's about: Set two generations before the destruction of the legendary Man of Steel’s home planet, Krypton follows Superman’s grandfather — whose House of El was ostracized and shamed — as he fights to redeem his family’s honor and save his beloved world from chaos.

Where to Watch: 20 episodes (95%) are available to stream on a subscription service (DC Universe). 21 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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hoopla
tubi_tv
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32. 3rd Rock from the Sun

IMDB LogoIMDB Star
7.7/10
Reelgood Logo
70/100
Year: 1996-2021Rated: TV-PGSeasons: 6
Comedy, Science-Fiction

What it's about: 3rd Rock from the Sun is an American sitcom that aired from 1996 to 2001 on NBC. The show is about four extraterrestrials who are on an expedition to Earth, which they consider to be a very insignificant planet. The extraterrestrials pose as a human family in order to observe the behavior of human beings.

Where to Watch: 139 episodes (100%) are available to watch free online (Tubi, PlutoTV, Peacock & 3 others). 139 episodes (100%) are available to stream on a subscription service (Hoopla). 139 episodes (100%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

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33. Sliders

IMDB LogoIMDB Star
7.4/10
Reelgood Logo
70/100
Year: 1995-2021Rated: TV-PGSeasons: 5
Action & Adventure, Science-Fiction

What it's about: In his basement in San Francisco, boy-genius Quinn Mallory unlocks the doorway to an infinite number of Earths. During a test run, Quinn invites co-worker Wade Wells and his teacher Professor Maximillian Arturo to see his new invention. But an increase in power and an early departure leave all three, plus a washed-up soul singer named Rembrandt "Crying Man" Brown, lost in a parallel world. Now they must "slide" from world to world, not only adapting to their changing surroundings, but also trying to get back to their world. Will they ever make it home?

Where to Watch: 88 episodes (100%) are available to watch free online (Peacock). 9 episodes (10%) are available to stream on a popular subscription service (Hulu). 87 episodes (99%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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34. V

IMDB LogoIMDB Star
7.9/10
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69/100
Year: 1983-2021Rated: TV-14Seasons: 3
Drama, Science-Fiction

What it's about: It debuted in 1983 as the two-part television miniseries V, written and directed by Johnson. It was followed in 1984 by a three-part miniseries, V: The Final Battle, and a one-hour weekly television series, V during the 1984-85 television season.A number of novels, comic books, video games and other media have been spun off from the franchise. Johnson's novel V: The Second Generation, an alternative sequel to the first miniseries which disregards V: The Final Battle and V: The Series, was released on February 5, 2008. Johnson claimed he was in negotiations for a TV adaptation of his sequel novel, but in October 2008, Warner Bros. Television announced they were producing a complete remake of V instead. This new V series ran for two truncated seasons on ABC, from November 3, 2009 to March 15, 2011.

Where to Watch: 3 episodes (7%) are available to rent or buy from $1.99 on 2 services (Google Play & Prime Video).

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35. Roswell

IMDB LogoIMDB Star
7.5/10
Reelgood Logo
69/100
Year: 1999-2021Rated: TV-14Seasons: 3
Drama, Science-Fiction

What it's about: Bizarre things start happening in the little New Mexico town where UFOs were spotted in 1947. Cut to 1999, when a cute high-school student saves the life of a teenage waitress. Surrounded by cliques of clever, angst-filled classmates, the two form a bond that threatens the survival of a secret universe involving superhuman powers, a yen for hot sauce and an alien gene pool.

Where to Watch: 61 episodes (100%) are available to watch free online (IMDb TV). 61 episodes (100%) are available to stream on a popular subscription service (Hulu). 61 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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36. ALF

IMDB LogoIMDB Star
7.4/10
Reelgood Logo
69/100
Year: 1986-2021Rated: TV-GSeasons: 4
Comedy, Family

What it's about: A furry alien wiseguy comes to live with a terran family after crashing into their garage.

Where to Watch: 104 episodes (99%) are available to watch free online (Tubi, Vudu & IMDb TV). 15 episodes (14%) are available to stream on a popular subscription service (Prime Video & Starz). 105 episodes (100%) are available to rent or buy from $0.99 on 6 services (iTunes, Google Play & 4 others).

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37. Extant

IMDB LogoIMDB Star
6.6/10
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69/100
Year: 2014-2021Rated: TV-14Seasons: 2
Drama, Science-Fiction

What it's about: An astronaut returns home from a year long solo mission in space. She tries to reconnect with her husband and son in their everyday life. Her experiences in space and home lead to events that ultimately will change the course of human history.

Where to Watch: 25 episodes (96%) are available to watch free online (PlutoTV & CW Seed). 24 episodes (92%) are available to stream on a subscription service (CBS All Access). 24 episodes (92%) are available to rent or buy from $1.99 on 1 service (Prime Video).

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38. V

IMDB LogoIMDB Star
7.4/10
Reelgood Logo
69/100
Year: 2009-2021Rated: TV-14Seasons: 2
Drama, Science-Fiction

What it's about: A re-imagining of the 1980's miniseries about the world's first encounter with an alien race in which the aliens call themselves The Visitors, and have a seemingly friendly agenda that may or may not be a cover for something more malevolent.

Where to Watch: 29 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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39. People of Earth

IMDB LogoIMDB Star
7.7/10
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68/100
Year: 2016-2021Rated: TV-MASeasons: 2
Comedy, Mystery

What it's about: Skeptical journalist Ozzie Graham investigates a support group for alien abductees to write about the members' supposed encounters. The more he digs into their oddball claims, the more he realizes there is truth in their stories and possibly even signs that point to his own alien abduction.

Where to Watch: 9 episodes (56%) are available to rent or buy from $1.99 on 4 services (Prime Video, Microsoft & 2 others).

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40. FLCL

IMDB LogoIMDB Star
8.2/10
Reelgood Logo
68/100
Year: 2000-2021Rated: TV-MASeasons: 3
Animation, Anime

What it's about: Naota is a normal Japanese 6th grade boy although a little cynical. When his older brother leaves for America to play baseball, his brother leaves his 17 year old girlfriend Mamimi behind. Mamimi is sending mixed signals and make advances on Naota, and he doesn't know what to do about her. But to make matters worse, Naota's world is totally turned upside down when he is run over by a woman on a Vespa. During their first encounter, she hits him over the head with her guitar, which then causes a horn to grow out of his forehead. She calls herself "Haruko" and her presence changes Naota's life to even further insanity.

Where to Watch: 18 episodes (100%) are available to watch free online (Adult Swim). 6 episodes (33%) are available to stream on a popular subscription service (Hulu & Funimation). 6 episodes (33%) are available to rent or buy from $1.99 on 4 services (iTunes, Google Play & 2 others).

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41. 3Below: Tales of Arcadia

IMDB LogoIMDB Star
7.8/10
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68/100
Year: 2018-2021Rated: TV-PGSeasons: 2
Action & Adventure, Animation

What it's about: After crash-landing on Earth, two royal teen aliens on the run struggle to blend in with humans as they evade intergalactic bounty hunters.

Where to Watch: 26 episodes (100%) are available to stream on a popular subscription service (Netflix). 26 episodes (100%) are available to rent or buy from $1.99 on 1 service (Vudu).

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42. Ancient Aliens

IMDB LogoIMDB Star
7.3/10
Reelgood Logo
67/100
Year: 2010-2021Rated: TV-PGSeasons: 16
Documentary, History

What it's about: Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.

Where to Watch: 118 episodes (46%) are available to watch free online (Peacock & IMDb TV). 212 episodes (83%) are available to stream on a popular subscription service (Netflix, Hulu & 3 others). 71 episodes (28%) are available to stream on a TV everywhere service (History). 220 episodes (87%) are available to rent or buy from $1.99 on 6 services (iTunes, Google Play, Prime Video & 4 others).

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43. Star-Crossed

IMDB LogoIMDB Star
7.3/10
Reelgood Logo
66/100
Year: 2014-2021Rated: TV-14Seasons: 1
Drama, Science-Fiction

What it's about: When Emery was 6 years old, an alien spacecraft crash-landed in her small town. Whether they came in peace or with more sinister intentions didn't matter: a fierce battle erupted as humans fought for control over their new rivals, an alien species called the Atrians. In the midst of the conflict, Roman, a 6-year-old Atrian boy, found his way to a shed behind Emery's house, where she temporarily protected him from harm, bringing him food, comfort - and friendship. Ten years later, the Atrians have been acclimated to life on Earth, but they are interned in a heavily-guarded camp known as the Sector to keep them separate from humans. Now, for the first time, a group of Atrian teens will enroll in a suburban human high school, with the goal of testing the feasibility of human/alien integration. Emery and Roman find each other again in a school and a society that distrusts everything about the Atrians. While the world around them rages with anger and prejudice, their bond becomes increasingly strong and increasingly dangerous.

Where to Watch: 13 episodes (100%) are available to rent or buy from $0.99 on 3 services (iTunes, Prime Video & Vudu).

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44. Teenage Mutant Ninja Turtles

IMDB LogoIMDB Star
7.8/10
Reelgood Logo
66/100
Year: 2012-2021Rated: TV-PGSeasons: 5
Action & Adventure, Animation

What it's about: The Teenage Mutant Ninja Turtles are back in an all-new animated series on Nickelodeon! Surfacing topside for the first time on their fifteenth birthday, the titular turtles, Leonardo, Michelangelo, Raphael and Donatello, find that life out of the sewers isn't exactly what they thought it would be. Now the turtles must work together as a team to take on new enemies that arise to take over New York City.

Where to Watch: 120 episodes (97%) are available to stream on a popular subscription service (Hulu). 115 episodes (93%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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45. The Outer Limits

IMDB LogoIMDB Star
7.7/10
Reelgood Logo
66/100
Year: 1995-2021Rated: TV-MASeasons: 7
Science-Fiction, Drama

What it's about: The Outer Limits is an anthology series of distinct story episodes, sometimes with a plot twist at the end. Unlike the original incarnation of the series, which was a pure anthology with each episode completely unrelated to the others, the revival series maintained an anthology format, but occasionally featured recurring story elements that were often tied together during season-finale clip shows.

Where to Watch: 39 episodes (25%) are available to rent or buy from $1.99 on 2 services (iTunes & Prime Video).

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46. The Whispers

IMDB LogoIMDB Star
7.2/10
Reelgood Logo
66/100
Year: 2015-2021Rated: TV-14Seasons: 1
Drama, Mystery

What it's about: We love to play games with our children. But what happens when someone else starts to play with them too? Someone we don't know. Can't see. Can't hear. In The Whispers, someone or something -- is manipulating the ones we love most to accomplish the unthinkable. An unseen alien force has figured this human weakness out. They have invaded earth and are using our most unlikely resource to achieve world domination – our children.

Where to Watch: 13 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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47. The Event

IMDB LogoIMDB Star
7.0/10
Reelgood Logo
66/100
Year: 2010-2021Rated: TV-14Seasons: 1
Action & Adventure, Drama

What it's about: The Event is an emotional, high-octane conspiracy thriller that follows Sean Walker, an everyman who investigates the mysterious disappearance of his would-be fiancée Leila, and unwittingly begins to expose the biggest cover-up in U.S. history.

Where to Watch: 22 episodes (100%) are available to watch free online (NBC). 1 episodes (5%) are available to stream on a popular subscription service (Hulu). 22 episodes (100%) are available to rent or buy from $1.99 on 5 services (iTunes, Google Play & 3 others).

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48. The First

IMDB LogoIMDB Star
6.7/10
Reelgood Logo
65/100
Year: 2018-2021Rated: TV-MASeasons: 1
Drama, Science-Fiction

What it's about: Follow the first human mission to Mars, exploring the challenges of taking the first steps toward interplanetary colonization. The story focuses not only on the astronauts, but also on their families and loved ones, as well as the ground team on Earth.

Where to Watch: 8 episodes (100%) are available to stream on a popular subscription service (Hulu).

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49. Roswell, New Mexico

IMDB LogoIMDB Star
6.2/10
Reelgood Logo
65/100
Year: 2019-2021Rated: TV-14Seasons: 3
Drama, Mystery

What it's about: After reluctantly returning to her tourist-trap hometown of Roswell, New Mexico, the daughter of undocumented immigrants discovers a shocking truth about her teenage crush who is now a police officer: He’s an alien who has kept his unearthly abilities hidden his entire life. She protects his secret as the two reconnect and begin to investigate his origins, but when a violent attack and long-standing government cover-up point to a greater alien presence on Earth, the politics of fear and hatred threaten to expose him and destroy their deepening romance.

Where to Watch: 5 episodes (19%) are available to watch free online (The CW). 26 episodes (100%) are available to stream on a popular subscription service (Netflix). 26 episodes (100%) are available to rent or buy from $1.99 on 3 services (Google Play, Vudu & YouTube).

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50. The Hitchhiker's Guide to the Galaxy

IMDB LogoIMDB Star
8.0/10
Reelgood Logo
65/100
Year: 1981-2021Rated: TV-PGSeasons: 1
Comedy, Science-Fiction

What it's about: Don't Panic! The story of Arthur Dent, an average Englishman who life was spared by his friend, who turned out to be an alien, while the planet Earth is destroyed. His friend tells him about the Hitchhiker's Guide to the Galaxy, a guide with anything you ever needed, and wanted to know. They travel across the galaxy, meeting friendly, and not so friendly characters in order to find the great question (the answer being 42).

Where to Watch: 6 episodes (100%) are available to stream on a popular subscription service (Prime Video, Hulu, BritBox & 1 other). 6 episodes (100%) are available to rent or buy from $1.99 on 3 services (Google Play, Vudu & YouTube).

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