When does The Big O return?

The Big O is a Japanese mecha-anime television series. The story takes place forty years after a mysterious occurrence causes the residents of Paradigm City to lose their memories. The series was designed as a tribute to Japanese and Western shows from the 1960s and 1970s. The English-language version premiered on Cartoon Network's Toonami on April 2, 2001, and ended on April 23, 2001.