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