Join Walter Cronkite on an investigative journey covering three of the most pressing environmental issues of our time: global warming, ocean habitat destruction, and deforestation.
Strategic targets on Earth are being destroyed by an unknown weapon. Government security head Henderson suspects it's an "atomic ray" originating from the moon.
A ravaging plague has struck the Earth threatening no less than global extinction. This alien disease is believed to be the evil spawn of Ming, the merciless Emperor of Planet Mongo. The world's only hope now rests with Flash Gordon.