TINA FEY, BARBARA WALTERS, LORNE MICHAELS (ABC/ DONNA SVENNEVIK) Photo

From: Photo Coverage: Best in TV: The Greatest TV Shows of All Time Hosted by Barbara Walters

What are the greatest television shows of all time? Who are our favorite TV mom and dad? Who is our favorite television host of all time? It's America's turn to decide, as a collaboration between ABC News and PEOPLE Magazine gave TV fans the opportunity to vote online at www.bestintelevision.com for their favorites of all time. With more than one million votes cast, the results will be revealed during an unprecedented two-hour broadcast, a special edition of '20/20', 'Best in TV: The Greatest TV Shows of Our Time with Barbara Walters,' airing TUESDAY, SEPTEMBER 18 (9:00-11:00 p.m., ET) on ABC, in conjunction with ABC's broadcast of the Emmy Awards.