Ace Holden
Billy Halop
Eddie Holden
Gene Reynolds
Henchman Beal
John Bleifer
Henchman Comora
Eddie Foster
Henchman Augar
John Bagni
Henchman Monk
Noel Cravat
Agent Dick Parsons
Paul Phillips
Grace
Kathryn Adams
Whitey
William Benedict
Sergeant
Lynton Brent
Chemist
Paul Bryar
Col. Mitchell
Frederick Burton
The Baron
Lionel Atwill
Jerry Markham
Frank Albertson
Bolts Larson
Huntz Hall
Stick Munsey
Gabriel Dell
Creaseball Plunkett
Bernard Punsly
Jack
Frankie Darro
Double Face Gordon
David Gorcey
Henchman Araka
Turhan Bey
Director
Lewis D. Collins
Screenplay
Paul Huston
Griffin Jay
Ray Taylor
George H. Plympton