Agent Larry Cameron
Greta Holvig
Agent George Timothy (as Pat O'Moore)
Herr Schmidt
Kay
Dr. Heligmann
Prof. Gustav Kleinheldt
Becker
Otto Manfred
Dr. Zarig
Anchaka Schmidt
Omnibus Conductor (uncredited)
Ernst - Nazi Henchman (uncredited)
Hans Zeidler (uncredited)
Nazi Headquarters Radioman (uncredited)
Milford (uncredited)
Harris (uncredited)
Agent Clark (uncredited)
Frau Zinderhoff (uncredited)
Cigarette Counter Clerk (uncredited)
Chief Agent Hanover (uncredited)
Kutner (uncredited)
Agent Redding (uncredited)
Agent Lindsey (uncredited)
Agent Thompson / Narrator (uncredited)
'Hansel' in Radio Show (voice) (uncredited)
Frau Schmidt (uncredited)
Radio Voice (voice) (uncredited)
Agent Benson (uncredited)
Brig. Gen. Carstairs (uncredited)
Customs Inspector (uncredited)
Leopold - Nazi Forger (uncredited)
Dr. Upton (uncredited)
Chubby Man (uncredited)
Sigmund (uncredited)
Herr Kompenik (uncredited)
Rina - Heligmann's Housekeeper (uncredited)
Frau Kompenik (uncredited)
Herr Zinderhoff (uncredited)
Senator Bradley (uncredited)
Sinclair - Carstairs' Aide (uncredited)
Griswold (uncredited)
English Radio Operator (uncredited)