Joseph Cotten
Dupin
Barbara Stanwyck
Lorna Bounty
Louis Calhern
Charles Theverner
Leslie Caron
Madeline Minot
Joe De Santis
Martin, the butler
Jim Backus
Flaherty
Margaret Wycherly
Mrs. Flynn, the housekeeper
Richard Hale
Durand, the lawyer
Nicholas Joy
Dr. Roland
Roy Roberts
Policeman
Mitchell Lewis
Zack, the waiter
Jean Inness
Landlady
Francis Pierlot
Pharmacist
Jimmy the Crow
Villon (uncredited)