With less than two weeks until Season 3 of The Walking Dead debuts, AMC is ramping up the marketing campaign with yet another trailer. Over the past two seasons, Rick (Andrew Lincoln) and his group of survivors haven't had to worry about their own kind (i.e. non-zombies) too much, but that is all about to change this year. Take a look at the new footage before Season 3 kicks off with "Seed" Sunday, October 14 at 9 PM ET.