The Beast from 20,000 Fathoms (trailer, 1953)

I say there are things better left unsolved. Who knows what waits for us in nature's no man's land. Impossible? Unbelievable? Fantastic? But I tell you it could happen. It could happen. It could happen. It could happen. Yes, it could happen.

For various authorities believe that buried somewhere under the polar ice cap, in a state of suspended animation, are the awesome creatures. The Leviathan's that roamed the Earth at the dawn of time. And under certain conditions, a nuclear explosion could free one from his icy tomb.

Then guided by instinct, the beast would come back, back to the caverns of the deepest Atlantic where it was spawned. An armored giant, wreaking his prehistoric fury on modern man and his puny machines. Cities would be terrorized by the cruel intruder from the past.

Populations crazed and panicked with fear by its destructive force. Strannet and steel would crumble. Soldiers and their weapons would be powerless before the onslaught of the beast. The beast! The beast! The beast from 20,000 fathoms.

Peril Square, 34th Street, Broadway. Every section of the city has got it. No one knows where the monster will strike next. Another one, Colonel? No. You know where the radio-active isotope is? No, but if it can be loaded, I'll load it.

Just remember one thing. This is the only isotope of its kind, this side of old bridge, so you can't miss.