The Mystery Squadron
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.
- Country : United States of America
- Genre : Action, Mystery
- Director : Colbert Clark, David Howard
- Cast : Bob Steele, Guinn "Big Boy" Williams, Lucile Browne, Jack Mulhall, Purnell Pratt, Robert Frazer