LOS ANGELES -- The post-apocalyptic drama "The Walking Dead," which resumes its second season tonight on AMC, prides itself on its sprawling ensemble cast: one part zombies looking for their next meal, the other part survivors trying not to become dinner. Although all the survivors have struggled to maintain a semblance of humanity and sanity, no one has struggled with it more than Shane, played by Jon Bernthal. (Spoiler alert: If you're not caught up on this season, you may want to stop reading now.)







