Trivia: This low-budget suspense/adventure was produced during the early Cold War and the flying saucer craze of the late 1940s and early 1950s, and it's often hailed as the first UFO-themed feature film. But, except for a crude saucer prop and a couple of cheesy, split-second visual effects, this movie is primarily a Cold War espionage story with Russian spies attempting to steal American weapons technology. The filmmakers' original intent was to include actual government-authorized flying saucer footage; accordingly, the film's prologue reads "We gratefully acknowledge the cooperation of those in authority who made the release of 'The Flying Saucer' film possible at this time." However, the filmmakers apparently never obtained any flying saucer footage (government-authorized or otherwise), and no such footage appears in the movie.