Hank Davis, foreman on a huge dam project, enlists the aid of his two flyer friends when a sinister figure known as The Black Ace leads his Mystery Squadron of masked pilots in an attempt to destroy the dam.
Hank Davis, foreman on a huge dam project, enlists the aid of his two flyer friends when a sinister figure known as The Black Ace leads his Mystery Squadron of masked pilots in an attempt to destroy the dam.
Top Cast
Bob Steele
Character: Fred Cromwell
Guinn 'Big Boy' Williams
Character: Bill 'Jellybean' Cook
Lucile Browne
Character: Dorothy Gray
Jack Mulhall
Character: Henry 'Hank' Davis
Purnell Pratt
Character: Lafe Johnson
Robert Frazer
Character: Dr. Flint
J. Carrol Naish
Character: Collins
Bob Kortman
Character: Bracken
Lafe McKee
Character: Stephen Gray
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