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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 26,829 Science Fiction titles — no signup, no subscription required. Updated daily with the newest Science Fiction releases.

The Cosmonaut (2003)1080P
The Cosmonaut (2003)
The Romantic Nebula (2026)HD
The Romantic Nebula (2026)
Jump! (2023)HD
Jump! (2023)
The White Room (2013)HD
The White Room (2013)
Siren (2014)HD
Siren (2014)
Knights (1993)HD
Knights (1993)
Jane (2025)HD
Jane (2025)
ObdurateHD
Obdurate
GoShogun: The Time Étranger (1985)1080P
GoShogun: The Time Étranger (1985)
Siren (2025)HD
Siren (2025)
One Day When I Was Lost (2023)HD
One Day When I Was Lost (2023)
The Hyperborean (2023)HD
The Hyperborean (2023)
Alpha Code (2020)HD
Alpha Code (2020)
Octopus (2000)HD
Octopus (2000)
North Shinjuku 2055 (2021)HD
North Shinjuku 2055 (2021)
The Giant Behemoth (1959)HD
The Giant Behemoth (1959)
Collision Earth (2011)HD
Collision Earth (2011)
Girls just Wanna have Kill (2024)HD
Girls just Wanna have Kill (2024)
The Incredible Melting Man (1977)HD
The Incredible Melting Man (1977)
From the Depths: The Story of the USS Kerenza (2023)HD
From the Depths: The Story of the USS Kerenza (2023)
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123Movies

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