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 Smith (actor) Circle". He was cast as Private Reynolds that year in the picture "Tomahawk Trail", starring Chuck Connors. Smith appeared twice on the ABC/Warner Brothers western series, "Colt .45", starring Wayde Preston. He was cast as The Comanche Kid in "Gallows at Granite Gap" (November 8, 1957), with Virginia Gregg as Martha Naylor and Stuart Randall, later a recurring character with Smith on "Laramie", as Sheriff Mort Cory. The child actor Ken Osmond was cast as Tommy. Smith subsequently appeared on "Colt .45" as Shelby Taylor in "Point of Honor" (March 21, 1958). In this episode Cameron Mitchell portrayed Dr. Alan