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,
Justin Smith (Australian actor) also appeared in the Cherry Orchard and Ruby Moon for the Sydney Theatre Company and the productions, "Shakespeare's R & J", Servant Of Two Masters, and Just Macbeth (Sydney Opera House and Edinburgh Fringe Festival seasons), for the Bell Shakespeare Co. Aust. His TV credits included, the ABC TV mini-series, Queen Kat, Carmel and St Jude, Stingers and White Collar Blue. In 2007 Smith was nominated for an AFI award for his role in "Bastard Boys". In 2008, Smith played the role of Tony (Billy's older brother) in "Billy Elliot the Musical", for which he was nominated for Best Actor