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.

Barlow loses a case against a known criminal. He believes the man is guilty but he is ordered to re-investigate the crime and finds a problem he doesn't want to face.