"She is on a mission to collect specimens of men for her barren world, because Mars endured a violent race war which climaxed in the destruction of the male species. The females killed every single male on Mars! One has to imagine whichever devil girl shot the last devil guy said something along the lines of "Oops.""
"Die-hards may find some faint amusement in the Devil Girl's imperious, slightly bitchy manner, her ungainly robot's all-too-brief appearances, and the vaguely Monty Pythonish reactions of the Scottish townsfolk to their cosmic visitors. Also on the plus side: Nyah's dominatrix-like leather/vinyl costume; the cool 50s-deco-look spaceship and robot; OK, if limited, special effects, and the absolutely radiant Hazel Court.""
Theorists often imagine technologically superior and socially mature races will act in ways unfathomable to humanity. None of them had a hand in this movie. While Nyah impatiently waits for her flying saucer to repair itself she mercilessly taunts the assembled alcoholics about how inferior they are. Stuff like "we have a perpetual motion ray" and "our race has perfected negative fission reactions." Very impressive Nyah, now please explain how they work (which would probably get you shot)."