Smallville is an American superhero television series developed by writer-producers Alfred Gough and Miles Millar, based on the DC Comics character Superman created by Jerry Siegel and Joe Shuster. The series, initially broadcast by The WB, premiered on October 16, 2001. After Smallville's fifth season, The WB and UPN merged to form The CW, the series' later United States broadcaster. Smallville was generally positively received when it began. Former Superman star Christopher Reeve expressed approval for the series, making two guest appearances before his death. The pilot episode set a ratings record for a WB debut, with 8.4 million viewers. Over ten seasons the series averaged about 4.34 million viewers per episode, with season two the highest-rated at 6.3 million. By the end of its run, Smallville passed Stargate SG-1 as the longest-running North American science-fiction series by episode count.Since its first season, the series received accolades ranging from Emmys to Teen Choice Awards.