title: D.Gray-man
context: In June 2006, Shueisha announced that the D.Gray-man manga would be adapted as an anime.[54] Its first episodes were directed by Osamu Nabeshima and produced by Dentsu, TMS Entertainment, Aniplex, and TV Tokyo. TMS Entertainment provided the animation, while Aniplex provided the music. The series began airing on October 3, 2006 on TV Tokyo.[55] The anime's 51-episode first season, known as the "1st stage", ended on September 25, 2007.[56][57] The 52-episode second season, known as the "2nd stage", began on October 2, 2007 and ended on September 30, 2008, for a total of 103 episodes. The anime adapts the manga's storyline from the beginning and concludes after the destruction of the Black Order headquarters.[58][59] The episodes were released by Aniplex on 26 DVDs from February 7, 2007 to March 4, 2009.[60][61]
question: When did D.Gray-man first air?
answers: October 3, 2006