Superman must stop a madman from destroying Manhattan with electronically controlled earthquakes.
A mad scientist creates a giant magnet that brings celestial bodies down from the sky. The police try to destroy it just as he is in the process of bringing down a comet. This causes the comet to spin out of control and threaten to destroy the earth! Superman comes to the rescue.
Superman gets bad press because an imposter is committing crimes in a Superman outfit.
Clark Kent helps a Federal agent escape a gang of Nazi saboteurs, and lets himself be captured to learn their plans. This is the last and 17th of the Max Fleischer Superman series.