Darker than Black: Kuro no Keiyakusha (DARKER THAN BLACK-黒の契約者-, Dākā Zan Burakku -Kuro no Keiyakusha-?, lit. "Darker than Black: The Black Contractor") is an anime television series, created, directed and written by Tensai Okamura and animated by Bones. It premiered across Japan from April 5, 2007 on MBS, TBS, and its affiliated broadcast stations, with its satellite television premiere in Japan on Animax in May 2007. The music for the series is composed by Yoko Kanno. The series has also been adapted into two manga series, which are serialized in Monthly Asuka and in Young Gangan. The anime also was awarded Best Original Anime of The Year by GoGoplex, a popular magazine for teens.

A second season titled Darker than Black: Ryūsei no Gemini (DARKER THAN BLACK-流星の双子-, Dākā Zan Burakku -Ryūsei no Jemini-?, lit. "Darker than Black: Gemini of the Meteor") will premiere in October 2009.

Source: Wikipedia