<Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Th> Website </Th> <Td> www.that70sshow.com </Td> </Tr> <P> That' 70s Show is an American television period sitcom that originally aired on Fox from August 23, 1998, to May 18, 2006 . The series focused on the lives of a group of teenage friends living in fictional Point Place, Wisconsin from May 17, 1976 to December 31, 1979 . </P> <P> The main teenage cast members were Topher Grace, Mila Kunis, Ashton Kutcher, Danny Masterson, Laura Prepon and Wilmer Valderrama . The main adult cast members were Debra Jo Rupp, Kurtwood Smith, Don Stark, Tommy Chong and, in a limited role, Tanya Roberts . </P>

When did that 70's show first air