Kadro (9)
Jim DavisJoseph Cummins
Ian KeithFBI Director SinclairGeorge TravellRucca
Frederick WorlockHugo Stregel
Stanley AndrewsMitchell (uncredited)
Hugh BeaumontFBI Chemist (uncredited)
Ralph DunnVic, Stregel's Thug (uncredited)
Byron FoulgerPelly, Stregel's Henchman (uncredited)
Ian WolfeGruning, Stregel's Henchman (uncredited)