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,
Ray Smith (actor) old. After leaving school Smith became a builder's labourer. Following national service in the army, he began acting professionally at the Prince of Wales Theatre in Cardiff, then joined the Swansea Grand Theatre as an assistant stage manager. He later moved to London, where he spent a year unemployed before he landed a part in a play about the Hungarian uprising. Smith made his television debut in "Shadows of Heroes" in 1959, and then his appearances in series such as "Z-Cars" and "A Family at War" made him known to the public. He also appeared as Detective Inspector Percy Firbank