The Ultimate Vampire Resource and Directory

The film is set in 1956, a year before the first satellite, Sputnik I went into orbit. In the film, "Project Skyhook," a U.S. effort to launch a dozen satellites, is visited by a flying saucer. A misunderstanding leads to the aliens being fired on, and they retaliate by destroying the project site, killing everyone except the two principal scientists, Dr. and Mrs. Marvin (a married couple). The sequence of events quickly spirals out of control and leads to a full scale invasion. Flying saucers attack Washington, DC, Paris, London and Moscow. In the end, the alien saucers are defeated over the skies of Washington by a device using high-power sound coupled with an electric field that stops the saucers' propulsion systems.