Casts
Bela Lugosi
Dr. Feodor Orloff / Prof. John Dearborn
Hugh Williams
Det. Insp. Larry Holt
Greta Gynt
Diana Stuart
Edmon Ryan
Lieutenant Patrick O'Reilly
O.B. Clarence
Prof. John Dearborn (voice)
May Hallatt
Police Constable Griggs
Bryan Herbert
Police Sgt. Walsh
Julie Suedo
Orloff's Secretary
