Infinite Crisis was a seven-issue limited series of comic books published by DC Comics, beginning in October of 2005. It was written by Geoff Johns and illustrated by Phil Jimenez, George Pérez, Ivan Reis and Jerry Ordway. Each issue was released with two variant covers: one by Pérez, and one by Jim Lee and Sandra Hope.
The series storyline was a sequel to DC's 1985 limited series Crisis on Infinite Earths. It revisited characters and concepts from that earlier Crisis, including the existence of DC's Multiverse. Some of the characters featured were alternate versions of comic icons such as an alternate Superman named Kal-L, who came from a place called "Earth-Two". A major theme was the nature of heroism, contrasting the often dark and conflicted modern-day heroes with memories of "lighter" and ostensibly more noble and collegial heroes of American comic books' earlier days.
The story's plot was actually initiated when a superheroine, Donna Troy, died in 2003's Teen Titans/Young Justice crossover, Graduation Day. A 2004 limited series Identity Crisis also retroactively labeled it as a tie-in. DC officially began leading up to the new Crisis with a one-shot issue Countdown to Infinite Crisis, followed by four six-issue limited series that tied into and culminated in Infinite Crisis.
Once the Crisis was completed, DC used the One Year Later event to move the narratives of most of its DC Universe series forward by one year. The weekly series 52 began publication in May 2006, and depicts some of the events which occurred between Infinite Crisis and One Year Later.
Infinite Crisis was announced in March 2005. The event was kicked off with the release of Countdown to Infinite Crisis (previously referred to as "DC Countdown" to keep the true title of the upcoming limited series a secret). Countdown to Infinite Crisis was followed by four six-issue limited series: The OMAC Project, Rann-Thanagar War, Day of Vengeance, and Villains United, as well as a four-part limited series DC Special featuring the return of Donna Troy. These first four limited series each had a special tie-in issue, released at monthly intervals during the Infinite Crisis event.