Z-Cars further spin-off entitled "Second Verdict" in which Barlow and Watt looked into unsolved cases and unsafe convictions. Frank Windsor made a final appearance as Watt in the last episode of "Z-Cars", "Pressure", in September 1978, with Robins (John Phillips), the Detective Chief Superintendent from the original series who had risen to chief constable. Jeremy Kemp, Brian Blessed, Joseph Brady and Colin Welland also appeared, though not as their original characters. "Z-Cars" is incomplete in the archives. The period 1962–65 is reasonably well represented; though with big gaps. With the 1967–71 sixth series, when the programme was shown almost every week,
Graham Roberts (actor) Graham Roberts (actor) Graham Roberts (10 October 1929 – 28 October 2004) was an English actor best known for his work on BBC Radio 3 and BBC Radio 4, including 31 years playing George Barford, the gamekeeper in Radio 4 soap opera "The Archers". He was born and raised in Chester, and was educated at King's School in the city. Later, he studied at Bristol and later Manchester University. He also appeared on film and television, including the series "Z Cars". He was also a continunuity announcer with Yorkshire Television until 1993, and Grampian Television. Roberts died on 28 October