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,
John Sharp (actor) John Sharp (actor) John Herbert Sharp ( – ) was a British actor, often on television. He made more than 100 appearances in television and occasionally films between 1949 and 1991. Although active in theatre, Sharp began as a film actor in 1949 and appeared in films throughout the 1950s. By the mid 1960s he mostly appeared in British television on popular shows of the era such as "The Avengers" "Murdersville" episodes, the "Randall and Hopkirk (Deceased)" episode "The Ghost Who Saved the Bank at Monte Carlo"; "The Prisoner", "Not On Your Nellie" opposite Hylda Baker, "Z-Cars", and "The Sweeney"