Among 'Walking Dead' zombies, Andrew Lincoln brings emotional heft

He plays tormented hero Rick Grimes, with one scene in particular, when Grimes' learns of his wife's death, a standout.As lean, haunted lawman Rick Grimes, the character at the center of the apocalyptic horrors that unspool on AMC's "The Walking Dead," Andrew Lincoln has been tasked with embodying the tormented hero, the wounded husband, the emotionally unavailable father aspiring to do better by his young son, sometimes in the course of a single episode.