Good Atom/Bad Atom?

Forgive me if this is a recurring question, as I am new to the Forum. I have a faint childhood recollection of a peculiar cartoon that was in rotation with Popeye, Oswald the Rabbit, and all the rest back in the late '50s. I believe it was in black and white and of Japanese origin. It was a metaphorical story of the atomic bomb, with a bad, gremlin-like atom who hops across the wings of a stylized B-36, spinning the propellers, and seals himself inside a bomb which is later dropped, laying waste to everything. Soon, the good atom surfaces from the destruction, and the ground is rejuvenated with flowers in a wave of creation. Not the most suitable subject for impressionable children. Does anyone know what I am talking about, or was I just dreaming?

I remember that cartoon. I can't remember the name, but you weren't dreaming. Iremember an evil scientist named "Crueloff" (sp) with a fox that spun the B-36's props with its tail. Our memories are otherwise the same. Ibelieve it was selected for showing over The Armed Forces Overseas Network.