"An evil doctor and the greedy wife of a rich man plot to poison him so they can get their hands on his money."
Boris Karloff
as Dr. Victor Sartorius
Joan Wyndham
as Eve Rowe
Arthur Margetson
as Roger Clifford
Mona Goya
as Yvonne Clifford
Anthony Ireland
as Capt. Arthur Halliday
Morton Selten
as Sir Charles Clifford
Nina Boucicault
as Mary Clifford
Gibb McLaughlin
as Jacques
J.H. Roberts
as Chalmers
Victor Rietti
as Doctor Bousquet
Wilfrid Caithness
as Morrocan Official
Henry Edwards
Director
Cyril Campion
Screenplay
Julius Hagen
Producer
Heinrich Fraenkel
Adaptation
Michael C. Chorlton
Editor
James A. Carter
Art Direction
Edward L. Alperson
Executive Producer
H. Fowler Mear
W.L. Trytel
Original Music Composer
Sydney Blythe
Director of Photography
William Luff
Alice Campbell
Novel
