Rod Serling in “The Old Man in the Cave”

Rod Serling

What you're looking at is a legacy that man left to himself. A decade previous, he pushed his buttons and, a nightmarish moment later, woke up to find that he had set the clock back a thousand years. His engines, his medicines, his science were buried in a mass tomb, covered over by the biggest gravedigger of them all: a Bomb. And this is the Earth ten years later, a fragment of what was once a whole, a remnant of what was once a race. The year is 1974, and this is the Twilight Zone.