Darker than Black: Gemini of the Meteor (2009)

Original Title: Dākā Zan Burakku -Ryūsei no Jemini-.
12 Episodes. (2010)
IMDb: http://www.imdb.com/title/tt2105255/
Episodes: http://en.wikipedia.org/wiki/List_of_Darker_than_Black:_Ry%C5%ABsei_no_Gemini_episodes#Darker_than_Black:_Gemini_of_the_Meteor

8.5/10.