Saw this film when I was about 10 years old. I loved Sci-Fi movies so naturally saw this one. But something was different. There was some unusually tense undercurrent in the story. Actually scared me. Years later I realized the nervous tension was due to the underlying theme of the 'cold war'. The Cold War was very real back in the 50's and as a kid you would hear, now and then, things that would scare the pants off of you. What came first? The chicken or the egg? Was this a sci-fi flick that used the cold war tension or was it overwhelmed by the omnipresent tensions of said war? Don't know but it scare the heck out of me back then.