Justice League: Crisis on Infinite Earths – Part One is an American animated superhero film based on the DC Comics superhero team the Justice League. Based on the DC Comics storyline "Crisis on Infinite Earths" (1985–1986) by Marv Wolfman and George Pérez, the film is directed by Jeff Wamester from a script by Jim Krieg. It is the eighth installment in the Tomorrowverse, sharing continuity with the films of the franchise that began with Superman: Man of Tomorrow (2020) and is the first part of a trilogy of films.