This exploitation programmer does a satisfactory job of entertaining in the science-fiction class. The technical effects created by Ray Harryhausen come off excellently in the Charles H. Schneer production, adding the required out-of-this-world visual touch to the screenplay, taken from a screen story by Curt Siodmak, suggested by Major Donald E. Keyhoe’s Flying Saucers from Outer Space.
Fred F. Sears’ direction mixes the make-believe at a good pace, achieving a neat measure of suspense and thrills as the plot unwinds. Dr. Russell A. Marvin (Hugh Marlowe), space-exploration scientist, interrupts his honeymoon with Carol (Joan Taylor) to find out why the free-flying, artificial satellites he has been launching for the military are being knocked down. Ancient humanoids, manning flying saucers, are the saboteurs and through communication with the hero, advise they intend to take over the earth. Yankee ingenuity comes up with a hastily devised weapon that neutralizes the saucers’ magnetic anti-gravity equipment.