<Li> All in the Family (CBS, January 12, 1971--April 8, 1979) </Li> <Li> The Sopranos (HBO, January 10, 1999--June 10, 2007) </Li> <Li> 60 Minutes (CBS, September 24, 1968--present) </Li> <Li> Late Show with David Letterman (CBS, August 30, 1993--May 20, 2015) </Li>

Tv guide's list of the 60 best series of all time