An heiress suddenly vanishes! A detective comes to the forlorn mansion of the missing heiress's wheel-chair-ridden uncle to discover the secret behind the disappearance.
Valentine Dyall
Dr. Morelle
Julia Lang
Miss Frayle
Jean Lodge
Cynthia Mason
Philip Leaver
Samuel Kimber
Peter Drury
Peter Lorrimer
Hugh Griffith
Bensall, the butler
