크레딧 출연 벨라 루고시 Dr. Feodor Orloff / Prof. John Dearborn Hugh Williams Det. Insp. Larry Holt Greta Gynt Diana Stuart Edmon Ryan Lieutenant Patrick O'Reilly Wilfred Walter Blind Jake Arthur E. Owen Dumb Lou Alexander Field Fred Grogan Gerald Pring Henry Stuart O.B. Clarence Prof. John Dearborn (voice) May Hallatt Police Constable Griggs Bryan Herbert Police Sgt. Walsh Charles Penrose Morrison, undercover detective Julie Suedo Orloff's Secretary 스텝 Walter Summers Writing John Argyle Production Patrick Kirwan Writing John Argyle Writing Walter Summers Directing Edgar Wallace Writing Guy Jones Sound Bryan Langley Camera