Invasion Of The Saucer Men (1957)

aka's: Hell Creatures/Invasion of the Hell Creatures/Invasion of the Saucer-Men

A teenage couple (Johnny Carter and Joan Hayden) making out in the woods accidentally runs over an alien creature with their car. The creature's hand falls off, but it comes alive and, with an eye growing out of it, begins to stalk the teens. Also with Frank Gorshin.