Follows Frankenstein Conquers the World (1965, Japan).
Part of the series. - Wild, Wild Planet (1965, Italy) - The War of the Planets (1966, Italy) - War Between the Planets (1966, Italy) - Snow Devils (1967, Italy)
Part of the series. - The Mysterians (1957, Japan) - Battle in Outer Space (1959, Japan) - War in Space (1977, Japan)
Part of the series. - 100 Monsters (1968, Japan) - Spook Warfare (1968, Japan) - Along with Ghosts (1969, Japan)