When does Smallville return?

Smallville is an American superhero television series based on the DC Comics character Superman. The series was produced by Millar/Gough Ink, Tollin/Robbins Productions, DC Comics and Warner Bros. Television. It follows the coming-of-age adventures of teenage Clark Kent in his fictional hometown of Smallville, Kansas. The pilot episode set a ratings record for the series, with 8.4 million viewers. By the end of its run, Smallville passed Stargate SG-1 as the longest-running North American science fiction series by episode count.