D.Gray-man is an anime series adapted from the manga of the same title by Katsura Hoshino. Produced by TMS Entertainment and directed by Osamu Nabeshima, the series follows the adventures of Allen Walker, an exorcist that wields the power of "Innocence" in order to fight against the Millennium Earl, an ancient sorcerer seeking to destroy the world with monsters called akuma. The episodes began airing on October 3, 2006 in Japan on TV Tokyo. The first season of the anime, known as the "1st stage", aired for 51 episodes, finishing its run on September 25, 2007. The second season, known as the "2nd stage", began airing on October 2, 2007, and finished its run on September 30, 2008, lasting 52 episodes. In 2008, Funimation acquired the series for an English-language release in North America. In June 2016, Funimation acquired the rights to the second half of the anime. A sequel titled D.Gray-man Hallow premiered in Japan in July 2016.