"Zero Hour: Crisis in Time!" is a comic book crossover storyline published by DC Comics in 1994, consisting of an eponymous five-issue limited series written and drawn by Dan Jurgens and a number of tie-in books.[1]
In the storyline, Hal Jordan, a member of the intergalactic police force known as the Green Lantern Corps, goes mad with grief after the destruction of his home town of Coast City during the "Reign of the Supermen!" storyline and attempts to destroy and remake the DC Universe after having obtained immense power as Parallax. The issues of the limited series were numbered in reverse order, beginning with issue #4 and ending with #0.[1] The crossover involved almost every DC Universe monthly series published at the time.