VIDEO : 'The Walking Dead' star Andrew Lincoln Promises a 'Darker' Season 7

"The Walking Dead" star Andrew Lincoln says things on the show are about to get real. In an interview with Entertainment weekly, he said "We are opening up in a way that we?ve not done before... It feels deeper. It's darker." When The Walking Dead wrapped up its sixth season last spring, we know that new villain Negan killed one of the series? established heroes. Which hero it was remains to be seen.