TV journalist Tab Holland assists Scotland yard with the murder of a reclusive millionaire whose corpse is discovered locked in a vault. The key to the vault is mysteriously found on the table beside the corpse.
| Actor | Role |
|---|---|
 Paul DanemanRex Lander | Rex Lander |
 Bernard ArchardSuperintendent Carver | Superintendent Carver |
 James VilliersTab Holland | Tab Holland |
 Katherine WoodvilleJane Ardfern | Jane Ardfern |
 Clive MortonRamsey Brown | Ramsey Brown |
| WWolfe MorrisYeh Ling | Yeh Ling |
 David HorneJohn Trasmere | John Trasmere |
| JJulie ShearingWaitress | Waitress |
 Leslie SandsSergeant Harris | Sergeant Harris |
 Ruth KettlewellMrs. Rushby | Mrs. Rushby |
 Maudie EdwardsBarmaid | Barmaid |
| AAlex GallierHead Waiter | Head Waiter |
| SStephen ZammitWaiter | Waiter |
| JJulian Forbes1st Plainsclothes Man | 1st Plainsclothes Man |
| TTony WallUniformed P.C. | Uniformed P.C. |
| AArch Taylor1st Removal Man | 1st Removal Man |