Invasion [1965] [DVD]

Aliens put an invisible force field around a secluded country hospital in this endearingly daffy British oddity, which must feature the cheapest alien takeover in history. Edward Judd is the hero scientist battling the extraterrestrial Oriental women in spacesuits, in an efficiently made and, yes, mildly exciting slice of cut-price science fiction.

Director Alan Bridges imbues the Home Counties atmosphere with a peculiar ambience that's astonishingly heady at times, too.