TV Comic the period between 1971 and 1973, when the strip was instead published in another Polystyle title, "Countdown/TV Action"). It also featured strip cartoons for the early puppet TV series produced by Gerry Anderson and AP Films—"Four Feather Falls", "Supercar" and "Fireball XL5"—until Anderson's titles became the focus of a rival publication, "TV Century 21". The 1960s issues are also noted as being the most collectable period in the comic's history. As well as "Doctor Who" and Anderson strips, other highly collectable material included "Telegoons" (which ran from 1963 to 1967), "Space Patrol" (from 1964 to 1965) and "The Avengers" (based
Gerry Anderson huge and dedicated international following that spans several generations. During the production of "Thunderbirds" the Andersons' marriage began to come under increasing strain, and the company also had a setback when the "Thunderbirds Are GO" feature film surprisingly flopped. In later interviews, Anderson said that he considered divorce, but this was halted when Sylvia announced that she was pregnant. Their son, Gerry Anderson Jr., was born in July 1967. By that time, production had started on a new series, "Captain Scarlet and the Mysterons" (1967), which saw the advent of more realistic marionette characters which, thanks to improvements in electronics