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Countdown was a British comic published weekly by Polystyle Publications, ultimately, under several different titles, from early 1971 to late summer 1973. The pages in each issue were numbered in reverse order, with page 1 at the end, a gimmick which was derived from the comic's title to create a countdown to the number one every week. Countdown initially featured many comic strips based on Gerry Anderson's Supermarionation TV shows which had been popular throughout the 1960s.