While looking through his telescope, John Putnam sees what at first appears to be a meteor shower, but it is actually a crash-landing alien spaceship! After investigating the crater from the impact, John informs the town sheriff, and receives nothing but ridicule. All that changes when the townsfolk start disappearing, and are replaced by eerie alien duplicates. A 50s sci-fi cult classic, the movie is set in the imaginary town of Sand Rock, Arizona, but was actually filmed on location in California and the Mojave Desert.