 The foundation of "Crisis on Infinite Earths" developed through a character (the Monitor) introduced in Wolfman's "The New Teen Titans" in July 1982 before the series itself started.Pérez was not the intended artist for the series, but was excited when he learned of it and called illustrating it some of the most fun he ever had.At the start of "Crisis on Infinite Earths", the Anti-Monitor (the Monitor's evil counterpart) is unleashed on the DC Multiverse and begins to destroy the various Earths that it comprises.