9. 'The Walking Dead' (2010-Present)
In its original form, as a zombie comic book by writer Robert Kirkman and artists Tony Moore and Charlie Adlard, The Walking Dead was the little series that could: an independent, black-and-white horror story that slowly but surely eclipsed all but the biggest full-color corporate superhero comics in popularity. As a television show, TWD's success has been almost as unlikely. It started, courtesy of Shawshank Redemption director Frank Darabont, as horror's stab at a prestige drama worthy of sharing AMC airtime with Mad Men; several showrunners and tens of millions of viewers later, it's a ratings juggernaut that showcases man's inhumanity to man with at least as much gory gusto as the cannibalistic attacks of the undead.