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Trailers shown here are official content embedded from YouTube. Watch the full titles on the rights-holders' official streaming platforms.© 2026 123Movies. All rights reserved.
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Science Fiction Movies & TV Shows Online Free

Stream the best Science Fiction movies and TV shows free on 123Movies in HD. Browse 27,041 Science Fiction titles — no signup, no subscription required. Updated daily with the newest Science Fiction releases.

Alien (1979)1080P
Alien (1979)
Star Wars (1977)1080P
Star Wars (1977)
Iron Man 2 (2010)HD
Iron Man 2 (2010)
The Maze Runner (2014)1080P
The Maze Runner (2014)
The Substance (2024)1080P
The Substance (2024)
Greenland 2: Migration (2026)HD
Greenland 2: Migration (2026)
Blade Runner 2049 (2017)1080P
Blade Runner 2049 (2017)
Despicable Me (2010)1080P
Despicable Me (2010)
Thor: Ragnarok (2017)1080P
Thor: Ragnarok (2017)
Predator: Badlands (2025)1080P
Predator: Badlands (2025)
Black Panther: Wakanda Forever (2022)HD
Black Panther: Wakanda Forever (2022)
Back to the Future (1985)1080P
Back to the Future (1985)
The Gorge (2025)1080P
The Gorge (2025)
X-Men: Days of Future Past (2014)1080P
X-Men: Days of Future Past (2014)
The Martian (2015)1080P
The Martian (2015)
Man of Steel (2013)HD
Man of Steel (2013)
Logan (2017)1080P
Logan (2017)
Guardians of the Galaxy Vol. 2 (2017)1080P
Guardians of the Galaxy Vol. 2 (2017)
2012 (2009)HD
2012 (2009)
X-Men: Apocalypse (2016)HD
X-Men: Apocalypse (2016)
1…345…500›
123Movies

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