Superman during one scene that he is mapping out the multiverses and muses on the idea that while he would call his universe Earth-1, all their counterparts would do the same with their own universes. This is acknowledged when Mister Terrific recruits the help of an alternate Superman from what Terrific calls Earth-9, which makes the alternate Superman mention that he is from Earth-1 and that they are Earth-22. See also List of DC Multiverse worlds References External links Earth-One, Earth-Two, Crisis on Infinite Earths at Don Markstein's Toonopedia. Archived from the original on June 3, 2016. 1961 in comics Fictional elements introduced in 1961 DC Comics dimensions DC Comics planets Fiction about Earth