A wealthy lord dies and is entombed with a valuable deposit of jewels. Seven keys are required to unlock the tomb and get hold of the treasure. A mad doctor uses an iron maiden to systematically eliminate the heirs to the fortune.
Cast
Leslie Banks
Dr. Manetta
Lilli Palmer
June Lansdowne
Cathleen Nesbitt
Ann Cody
Gina Malo
Glenda Baker
David Horne
Edward Havelock
Romilly Lunge
Dick Martin
Richard Bird
Inspector Cornelius 'Andy' Sneed
J.H. Roberts
Luis Silva
Aubrey Mallalieu
Lord Charles Francis Selford
Harry Hutchinson
Bevan Cody
Phil Ray
Tom Cawler
George Street
Chief Commissioner, Chief Commissioner (Uncredited)
Ross Landon
John Selford
Raymond Mander
P.C. in Sneed's Office (Uncredited)
Charles Paton
Handwriting Expert (Uncredited)
Crew
Norman Lee
Director, Screenplay
Gilbert Gunn
Screenplay
Edgar Wallace
Novel
Ted Richards
Editor
Ernest Palmer
Director of Photography
Alex Bryce
Director of Photography
Roy Parkinson
First Assistant Director
John Argyle
Producer
Ronald Anscombe
Camera Operator
Harry Benson
Sound Supervisor
F. McNally
Sound Recordist
Guy Jones
Original Music Composer, Music Director
Hamilton G. Inglis
Production Manager
C. Gilbert
Art Direction
