I rate this right up there with other 50s sci-fi classics, Invasion of the Body Snatchers, Day the Earth Stood Still, and Them. The title makes you think you're in for a radioactive-teens-with-fangs-from-outerspace bomb. This is anything but. Excellent acting, tight direction, believable dialog, and truly creepy aliens give this a black and white thumbs up. Remade recently in a faithful adaptation, but despite (or because of) the color photography and bigger budget, this 50s version remains the better bet to watch.