The Big O is a Japanese mecha-anime television series created by designer Keiichi Sato and director Kazuyoshi Katayama for Sunrise. The writing staff was assembled by the series' head writer, Chiaki J. Konaka, who is known for his work on ''Serial Experiments Lain'' and ''Hellsing''. The story takes place forty years after a mysterious occurrence causes the residents of... imdb.com