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 Edgar Wallace Writing Walter Summers Directing Patrick Kirwan Writing Walter Summers Writing John Argyle Writing John Argyle Production Guy Jones Sound Bryan Langley Camera