A group of crooks accidentally kill an elderly shop assistant while stealing the keys to the jewellery shop where she works. When his superiors think that the case is better handed over to Scotland Yard, the local detective inspector, Sparrow, decides to go solo to investigate the crime himself.
| Actor | Role |
|---|---|
 Anthony NewlandsMr Reynolds | Mr Reynolds |
 Glyn HoustonInspector Sparrow | Inspector Sparrow |
 Nadja ReginMrs Reynolds | Mrs Reynolds |
 Allan CuthbertsonSuperintendent Symington | Superintendent Symington |
 Jack MayInspector Hudson | Inspector Hudson |
 Murray MelvinLarkin | Larkin |
 Wanda VenthamWaitress | Waitress |
 Michael CainePaddy Mooney | Paddy Mooney |
 William GauntDetective Sergeant Reeve | Detective Sergeant Reeve |
| EEric DodsonDr. Wolfson | Dr. Wolfson |
 Michael ColesPin Norman | Pin Norman |
 Ken WayneBaker | Baker |
 Jerry StovinLewis | Lewis |
| PPeter ThomasBell | Bell |
 Neil McCarthyDusty | Dusty |
| SSusan MaryottSue Warren | Sue Warren |
| NNancy O'NeilMiss Martin | Miss Martin |
 Yvonne BuckinghamJenny | Jenny |
| BBartlett MullinsMr. Walters | Mr. Walters |