Dennis O'Brien
'Professor' Fredrick Simpson Schicka
Inspector Bruger
Irma Rand
Sylvia Rand
Gail Chase
Ed Gannon
Steve Belzig alias Vic Lundy
Bill Rafferty
Eddie Paige
Harry Barton
Sparring Partner
Director
Screenplay
Original Story
Original Story
Producer
Associate Producer
Music
Director of Photography
Editor
Editor
Art Direction
Set Decoration
