Opposite page: The five Doctors represented in the 1981 repeat season – William Hartnell in the first episode, An Unearthly Child (1963), Patrick Troughton in The Krotons (1968-69), Jon Pertwee in The Three Doctors (1972-73), Tom Baker in Logopolis (1981) and Peter Davison (from the 1982-84 title sequence).
Doctor Who fans are now accustomed to breaks of over a year between seasons, but in the early 1980s the ten-month gap between Seasons 18 and 19 was unprecedented.