Sarah Wayne Callies, Robert Kirkman, Andrew Lincoln, Danai Gurira

Sarah Wayne Callies, Robert Kirkman, Andrew Lincoln, Danai Gurira

FILE - In this Thursday, Oct. 4, 2012 file photo provided by AMC, from left, Sarah Wayne Callies, Robert Kirkman, Andrew Lincoln, and Danai Gurira attend the premiere of "The Walking Dead" at Universal Studios, in Los Angeles. (AP Photo/AMC, John Shearer)

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