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,
Reginald Marsh (actor) worked in rep. In 1958, he started working behind the scenes of Granada Television, but he soon went back to acting. From the 1960s he appeared in many films, including "The Day the Earth Caught Fire" (1961), "Jigsaw" (1962), "Berserk!" (1967), "The Ragman's Daughter" (1972), "Young Winston" (1972) and "The Best Pair of Legs in the Business" (1973), and on television, in such series as "Dixon of Dock Green", "Z-Cars" and "The Persuaders!". He also played bookie Dave Smith in "Coronation Street" on and off from 1962 to 1976. Marsh played works general manager Arthur Sugden in the boardroom drama