Zwiastun
Obsada
Warren Hull
Jim Travers
Alan Baxter
John Baron aka The Kid
George Humbert
Mr. Spinelli (uncredited)
Charles Cahill Wilson
Police Capt. Wallace (uncredited)
Hobart Cavanaugh
Petty Louie
David Oliver
Mike Callahan
George Cleveland
Sam Adams - Company Engineer (uncredited)
Boris Karloff
David Mallory
Samuel S. Hinds
Steven Ranger
Frank Reicher
Carl - gang engineer
Jean Rogers
Joan Mallory
Ward Bond
Fingers
Edwin Maxwell
Lawyer Kruger
Chuck Hamilton
Policeman (uncredited)