Victor Jory

Character: Spike Holland

Iris Meredith

Character: Valerie Howett

James Craven

Character: Abel Bellamy

Robert Fiske

Character: Savini

Dorothy Fay

Character: Elaine Bellamy

Forrest Taylor

Character: Parker Howett

Jack Ingram

Character: Henchman Brad

Joseph W. Girard

Character: Inspector Ross

Kit Guard

Character: Dinky Stone

Fred Kelsey

Character: Capt. Thompson

Jack Cheatham

Character: Cop / Detective Charlie

Edmund Cobb

Character: Stevens / Agent 4-X / Thug Pilot

Kernan Cripps

Character: Frank

Charles Dorety

Character: Thug

Kenne Duncan

Character: Michael Bellamy

John Elliott

Character: Brewster

Herbert Evans

Character: Henderson

Franklyn Farnum

Character: Pete

Al Ferguson

Character: Butch

Eddie Fetherston

Character: Turk Martin

Chuck Hamilton

Character: Kardak

Harry Harvey

Character: Martin

Edward Hearn

Character: Cop

Jack Hendricks

Character: Lab Guard

Lloyd Ingraham

Character: Worthington

Warren Jackson

Character: Theater Attendant Charlie

John Paul Jones

Character: Tinder

Johnny Kascier

Character: Jake

Charles King

Character: Tardoni

Tom London

Character: Detective with Shiner

Sam Lufkin

Character: Thug

Mary MacLaren

Character: Mrs. Patton

Knox Manning

Character: Narrator (voice)

Bruce Mitchell

Character: Cop

Bud Osborne

Character: Lanton

Fred Parker

Character: Train Conductor

Constantine Romanoff

Character: West

Dick Rush

Character: Cop

Cy Schindell

Character: Darcy

Harry Tenbrook

Character: Vrooner

Anthony Warde

Character: Lefty Brent

Duke York

Character: Martel aka Harry Madison

Bert Young

Character: Biff