02/18/1991 at 01:00 AM EST
>CBS has dubbed this Classic Weekend, with tributes to three epochal shows. On Saturday (Feb. 16, 8 P.M. ET), Carroll O'Connor, Jean Stapleton. Rob Reiner and Sally Struthers regroup for All in the Family's 20th Anniversary Special, a clip-and-anecdote jamboree. Memorable performances from TV's longest-running (1948-71) variety show make up The Very Best of the Ed Sullivan Show (Sun., Feb. 17, 9 P.M. ET), hosted by Carol Burnett. (Topo Gigio, sign in please.) And who can turn the world on with a smile? On Monday (Feb. 18, 9:30 P.M. ET) Mary Tyler Moore welcomes back Ed Asner, Gavin MacLeod, Betty White and the gang for Mary Tyler Moore: The 20th Anniversary Show.