Overview

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

Fred Cromwell

Guinn 'Big Boy' Williams

Bill 'Jellybean' Cook

Lucile Browne

Dorothy Gray

Jack Mulhall

Henry 'Hank' Davis

Purnell Pratt

Lafe Johnson

Robert Frazer

Dr. Flint

J. Carrol Naish

Collins

Bob Kortman

Bracken