Free science fiction movies to watch online — page 15
1,847 movies with a free, licensed stream right now. Open any title to see which service — and whether that is still true today.
AllActionAdventureAnimationComedyCrimeDocumentaryDramaFamilyFantasyHistoryHorrorMusicMysteryRomanceScience FictionTV MovieThrillerWarWestern
Ad · 728 × 90
5.6Earth Girls Are Easy
1988 · Film
5.0Guardians
2017 · Film
6.3Upside Down
2012 · Film
5.5Cube 2: Hypercube
2002 · Film
6.3The Endless
2017 · Film
5.5Skylines
2020 · Film
6.4The Devil Conspiracy
2023 · Film
6.4A-X-L
2018 · Film
5.1Skyline
2010 · Film
5.5The Colony
2013 · Film
6.5From Beyond
1986 · Film
4.9A Sound of Thunder
2005 · Film
7.5The Day the Earth Stood Still
1951 · Film
5.9Universal Soldier: The Return
1999 · Film
6.8A Scanner Darkly
2006 · Film
5.7Z for Zachariah
2015 · Film
4.8Starship Troopers 3: Marauder
2008 · Film
6.0Voyagers
2021 · Film
5.7Altered
2025 · Film
6.7Altered States
1980 · Film