The Door with Seven Locks

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.

• 
  Norman Lee
• 
  Roy Parkinson

• 
  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
• 
  Ross Landon
  John Selford
• 
  Raymond Mander
  P.C. in Sneed's Office (Uncredited)
• 
  Charles Paton
  Handwriting Expert (Uncredited)