演职人员
Dr. Feodor Orloff / Prof. John Dearborn
贝拉·卢戈西
Det. Insp. Larry Holt
休·威廉姆斯
Diana Stuart
Greta Gynt
Lieutenant Patrick O'Reilly
Edmon Ryan
Blind Jake
Wilfred Walter
Dumb Lou
Arthur E. Owen
Fred Grogan
Alexander Field
Henry Stuart
Gerald Pring
Prof. John Dearborn (voice)
O.B. Clarence
Police Constable Griggs
May Hallatt
Police Sgt. Walsh
Bryan Herbert
Morrison, undercover detective
Charles Penrose
Orloff's Secretary
Julie Suedo