Reparto (7)
William GarganEllery Queen
Margaret LindsayNikki Porter
Charley GrapewinInspector Richard Queen
Gale SondergaardMrs. Van Dorn
Gilbert RolandPaul Gilette
Sig RumanHeinrich, Spy Leader
James BurkePolice Sergeant VelieWilliam GarganEllery QueenMargaret LindsayNikki PorterCharley GrapewinInspector Richard QueenGale SondergaardMrs. Van DornGilbert RolandPaul GiletteSig RumanHeinrich, Spy LeaderJames BurkePolice Sergeant Velie