A famous scientist invents a humanoid robot (the titular "monster"), so a greedy rival scientist plans to steal it for use in his criminal plans. His henchmen often kidnap a trained gorilla (the titular "ape") from the zoo, to aid in the schemes.
Robert Lowery | Ken Morgan | |
George Macready | Prof. Ernst | |
Ralph Morgan | Prof. Franklin Arnold | |
Carole Mathews | Babs Arnold | |
Willie Best | Flash | |
Jack Ingram | Dick Nordik |
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