Victor Jory

as Spike Holland

Iris Meredith

as Valerie Howett

James Craven

as Abel Bellamy

Robert Fiske

as Savini

Dorothy Fay

as Elaine Bellamy

Forrest Taylor

as Parker Howett

Jack Ingram

as Henchman Brad

Joseph W. Girard

as Inspector Ross

Kit Guard

as Dinky Stone

Fred Kelsey

as Capt. Thompson

Jack Cheatham

as Cop / Detective Charlie

Edmund Cobb

as Stevens / Agent 4-X / Thug Pilot

Kernan Cripps

as Frank

Charles Dorety

as Thug

Kenne Duncan

as Michael Bellamy

John Elliott

as Brewster

Herbert Evans

as Henderson

Franklyn Farnum

as Pete

Al Ferguson

as Butch

Eddie Fetherston

as Turk Martin

Chuck Hamilton

as Kardak

Harry Harvey

as Martin

Edward Hearn

as Cop

Jack Hendricks

as Lab Guard

Lloyd Ingraham

as Worthington

Warren Jackson

as Theater Attendant Charlie

John Paul Jones

as Tinder

Johnny Kascier

as Jake

Charles King

as Tardoni

Tom London

as Detective with Shiner

Sam Lufkin

as Thug

Mary MacLaren

as Mrs. Patton

Knox Manning

as Narrator (voice)

Bruce Mitchell

as Cop

Bud Osborne

as Lanton

Fred Parker

as Train Conductor

Constantine Romanoff

as West

Dick Rush

as Cop

Cy Schindell

as Darcy

Harry Tenbrook

as Vrooner

Anthony Warde

as Lefty Brent

Duke York

as Martel aka Harry Madison

Bert Young

as Biff