★ 5.7 Film
Not of This Earth
1957
Same creator (Roger Corman); both explore alien
★ 4.5 Film
Phantom from Space
1953
Both explore alien and extraterrestrial; both science fiction and horror
★ 4.9 Film
It Conquered the World
1956
Same creator (Roger Corman); both explore mind control and alien
★ 4.2 Film
Plan 9 from Outer Space
1957
Both explore california and alien; both science fiction and horror
★ 6.8 Film
Them!
1954
Both explore desert; both science fiction and horror
★ 5.3 Film
Queen of Blood
1966
Both explore alien; both science fiction and horror