Doomsday + 1 was an American post-apocalyptic comic-book series published by Charlton Comics in the 1970s.It is best known as the first original, color-comics series by artist John Byrne, who would go on to become a major industry figure. Byrne had previously drawn three unrelated, anthological short stories for comics, as well as the first three issues of a Saturday-morning cartoon licensed comic book before co-creating this original series.