Cast (13)

Bela Lugosi

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

Crew (8)

Walter Summers

Director

Edgar Wallace

Novel

John Argyle

Producer

Patrick Kirwan

Screenplay

John Argyle

Screenplay

Walter Summers

Screenplay

Bryan Langley

Director of Photography

Guy Jones

Original Music Composer