A gang of high class corporate thieves use blackmail to induce their victims to sell property at knock-down prices.
| Actor | Role |
|---|---|
 Bernard LeeDet. Supt. Meredith | Det. Supt. Meredith |
 Alexander KnoxColonel Calderwood | Colonel Calderwood |
 Moira RedmondDiana Marsh | Diana Marsh |
 William RussellMike Stafford | Mike Stafford |
 Richard VernonJohn Crewe | John Crewe |
 Richard WarnerMark Speller | Mark Speller |
 John GabrielMonet | Monet |
| JJack RodneyGregory | Gregory |
| SStanley MorganDet. Sgt. Anson | Det. Sgt. Anson |
| RRobert PercivalMr. Britton | Mr. Britton |
| AAnn HarrimanReceptionist | Receptionist |
| JJulie ShearingJudy | Judy |
| FFanny CarbyMrs. Wall | Mrs. Wall |
| IIan HamiltonWaiter | Waiter |
 Walter HorsbrughRegistrar | Registrar |