The series had several UK re-runs during the 1970s but was not shown on Yorkshire Television until 1981. Some broadcasters used an alternative version of the title sequence beginning with a zoom-in shot of Joe's special glasses accompanied by a voice-over from Tim Turner stating: "These are Joe 90's special glasses. Without them, he's a boy. Wearing them, he's an expert." These words, intended to warn young viewers not to endanger themselves by copying Joe's exploits, have sometimes been wrongly attributed to Keith Alexander.