Horror-Mask Key Clue As Master-Killer Slays Four!

The Falcon travels to Mexico where he gets involved with murder and a mysterious painting.

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Main Cast: Tom Conway, Mona Maris, Martha Vickers, Nestor Paiva, Mary Currier, Cecilia Callejo, Emory Parnell, Joseph Vitale, Pedro de Cordoba, Fernando Alvarado

Director: William Berke

Writers: George Worthing Yates, Gerald Geraghty

Editor: Joseph Noriega

Cinematographer: Frank Redman

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