Don Siegel's 1956 thriller follows Miles Bennell (Kevin McCarthy), a doctor who finds that a growing number of people believe their loved ones have been replaced with facsimiles who look and act the same. Miles is at a loss to explain this until he sees proof for himself. The movie's eerie themes, in which characters realize there's something wrong with their loved ones and that they themselves will be replaced, too, are still creepy decades later.
Sam Peckinpah, who directed such Western films as the 1969 movie "The Wild Bunch," appears in the film as a meter reader named Charlie Buckholtz.
"Snatchers" wasn't the only '50s sci-fi film to earn a spot on our list – keep an eye out for another famous one further up.
