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