Superman 1941 - "The Mechanical Monsters"

Superman battles a criminal mastermind and his robot army.

The Mechanical Monsters is a 1941 American animated short film directed by Dave Fleischer. It is the second of seventeen animated Technicolor short films based upon the DC Comics character Superman. Produced by Fleischer Studios, the story features Superman battling a mad scientist and his army of robots. It was originally released by Paramount Pictures on November 28, 1941