13. 'Late Night With David Letterman'
A failed Indiana weatherman takes over the graveyard shift after Johnny Carson and completely changes the way America sees itself. Letterman brought weirdos to the tube like we'd never seen before – from Larry "Bud" Melman to Harvey Pekar, from Peewee Herman to Sandra Bernhard, from R.E.M. to Andy Kaufman. Not to mention Paul Shaffer, the indispensable piano man. Letterman was a connoisseur of American eccentrics without ever pretending to be one himself, and a master interviewer, especially when he was up against a fellow curmudgeon, like when Cher called him an "asshole." (She was right, and thank God for that.) When Letterman made the move to CBS' Late Show in 1993, he changed titles and time slots, but kept that same acerbic spirit alive – especially in his magnificent final weeks, as he broke down the statistics: "33 years, 6,028 shows, eight minutes of laughter." We'll never see his like again.