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

Barney A. Sarecky

Screenplay

William Nobles

Director of Photography

Wyndham Gittens

Screenplay

Earl Turner

Editor

Al Martin

Screenplay

Sherman L. Lowe

Screenplay

Yakima Canutt

Stunts

Nat Levine

Producer

Ernest Miller

Director of Photography

Terry Kellum

Sound Recordist

Alvin Wyckoff

Director of Photography

George Magrill

Stunts

Colbert Clark

Director, Screenplay

Lee Zahler

Music

David Howard

Director, Screenplay