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 October 1963. This real-life drama inspired Anderson to create a new programme format about a rescue organisation, which eventually became his most famous and popular series, "Thunderbirds" (1964–1966). The dramatic title was inspired by the letter Anderson's older brother Lionel had written to his family during World War II. Grade was very enthusiastic about the concept and agreed to back a series of 25-minute episodes (the same length as "Stingray"), so the Andersons scripted a pilot episode, "Trapped in the Sky", and began production. Gerry initially wanted actress Fenella Fielding to perform the voice of Lady Penelope, but Sylvia convinced