The Mystery Squadron

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

Lafe McKee

— Stephen Gray

Edward Hearn

— Sheriff

Kernan Cripps

— Tom

Edward Peil Sr.

— Andrew Martin

Jack Mower

— Carter

Jack Perrin

— Roberts