Charles Quigley
— Bob Lane
Joyce Bryant
— Patricia Benson
Forrest Taylor
— Anton Benson
Walter Sande
— Jack Strong
Norman Willis
— Roy Benson
Alex Callam
— James Benson
James Metcalfe
— Culver Benson
Allen Doone
— Simon Leach
Edythe Elliott
— Milly Leach
John Beck
— Gyves
Charles King
— Silk Langdon
James C. Morton
— Casey
Hal Price
— O'Malley
Richard Alexander
— Henchman
Eddie Hart
— Henchman Jake
Lloyd Ingraham
— Managing Editor
Frank LaRue
— Inspector Cramer
Knox Manning
— Narrator (voice)
Ted Mapes
— Henchman Slim
Jack Perrin
— Mine Guard
Marin Sais
— Hannah - Silk's Housekeeper
Cy Schindell
— Henchman Red