<Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Td_colspan="2"> Website </Td> </Tr> <P> Whose Line Is It Anyway? (often known as simply Whose Line?) is an improvisational comedy television show, an adaptation of the British show of the same name . It aired on ABC and ABC Family from August 5, 1998 to December 15, 2007, hosted by Drew Carey . A revival of the show, hosted by Aisha Tyler, began airing on The CW on July 16, 2013 . </P> <P> The series features Ryan Stiles, Colin Mochrie, and Wayne Brady as its regular performers with the fourth seat occupied by a guest panelist . </P>

When did whose line is it anyway come out