Z-Cars
Z-Cars or Z Cars is a British television drama series centred on the work of mobile uniformed police in the fictional town of Newtown, based on Kirkby, Merseyside. Produced by the BBC, it debuted in January 1962 and ran until September 1978.

Pete Simmonds is out from prison looking for the man who informed on him. But not only the informer has to live in fear of reprisals. Simmonds is strong and violent and the witnesses at his trial were promised police protection on the day of his release.