By Jeff Labrecque
November 08, 2010 at 09:14 PM EST

AMC has renewed its zombie frightfest, The Walking Dead, for a 13-episode second season. Since premiering in Mad Men‘s Sunday night timeslot on Halloween, the Frank Darabont-produced series has reached more adults 18-49 than any cable show in history. The premiere drew a total of 5.3 million viewers.

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