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.
| Actor | Role |
|---|---|
 Valentine DyallDr. Morelle | Dr. Morelle |
| JJulia LangMiss Frayle | Miss Frayle |
 Jean LodgeCynthia Mason | Cynthia Mason |
 Philip LeaverSamuel Kimber | Samuel Kimber |
| PPeter DruryPeter Lorrimer | Peter Lorrimer |
 Hugh GriffithBensall, the butler | Bensall, the butler |