★ 6.2 Film
The 27th Day
1957
Both explore flying saucer; both science fiction
★ 5.3 Film
Tobor the Great
1954
Both explore cold war; both science fiction
★ 5.3 Film
The Atomic Submarine
1959
Both explore flying saucer; both science fiction
★ 5.7 Film
Santo vs. the Martian Invasion
1967
Both explore flying saucer; both science fiction
★ 5.2 Film
Giantess Battle Attack!
2022
Both explore independent film and low budget; both science fiction
★ 4.8 Film
Flesh Gordon
1974
Both explore independent film; both science fiction