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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 26,776 Science Fiction titles — no signup, no subscription required. Updated daily with the newest Science Fiction releases.

Chronicle (2012)HD
Chronicle (2012)
Captain America: The First Avenger (2011)1080P
Captain America: The First Avenger (2011)
Back to the Future Part II (1989)1080P
Back to the Future Part II (1989)
Hulk (2003)HD
Hulk (2003)
Ex Machina (2015)1080P
Ex Machina (2015)
Her (2013)1080P
Her (2013)
Prey (2022)1080P
Prey (2022)
Cosmic Princess Kaguya! (2026)1080P
Cosmic Princess Kaguya! (2026)
Dark Phoenix (2019)HD
Dark Phoenix (2019)
Laboratory Conditions (2018)1080P
Laboratory Conditions (2018)
The Great Flood (2025)HD
The Great Flood (2025)
Greenland (2020)1080P
Greenland (2020)
Lightyear (2022)HD
Lightyear (2022)
M3GAN 2.0 (2025)1080P
M3GAN 2.0 (2025)
Maze Runner: The Scorch Trials (2015)HD
Maze Runner: The Scorch Trials (2015)
Terminator: Dark Fate (2019)HD
Terminator: Dark Fate (2019)
Star Wars: Episode II - Attack of the Clones (2002)HD
Star Wars: Episode II - Attack of the Clones (2002)
Predators (2010)HD
Predators (2010)
Event Horizon (1997)HD
Event Horizon (1997)
G.I. Joe: Retaliation (2013)HD
G.I. Joe: Retaliation (2013)
1…111213…500›
123Movies

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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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