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 must stop a madman from destroying Manhattan with electronically controlled earthquakes.
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.