Cast: Edward Peil Sr., Dick Botiller, James Craven, Sam Edwards, John Elliott, Franklyn Farnum, Al Ferguson, Joseph W. Girard, Chuck Hamilton, George Magrill and others
Secret Service Major Steel (Joseph W. Girard), is one of the few men in American aware of the fact that Captain Albright (Dave O'Brien) is also Captain Midnight, daring masked aviator dedicated to fighting gangsters and enemies of America. When murderous bombing attacks are made on West Coast munitions plants, Steel sends for Albright and asks him to track down the mysterious Ivan Shark (James Craven), the foreign agent mastermind behind the attacks. Shary has learned about an ingenious range finder, invented by John Edwards (Bryant Washburn, and makes plans to obtain a model of the invention. Edwards instructs his daughter, Joyce (Dorothy Short), to bring the model to Albright for safekeeping in his mountain laboratory. Shark takes Edwards prisoner by Albright assures Joyce that her father will be saved and an end put to Shark's reign of terror.
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