Great skits (especially the movie parodies), music and celebrity guests add up to a classic series with the gifted, versatile Burnett and her talented regulars. The variety show debuted in 1967 on CBS, and was a Saturday-night staple for much of its 11-season run on the network before it was 'time to say goodbye' with a brief stint on ABC in 1978. Lesser, retooled incarnations aired on NBC (1990-91) and again on CBS in 1991.