I just realized a major parallel between seasons 2 and 3.  in the second to last episode, a character who has redeeming qualities, but has been very troublsome (Shane and Meryl) are killed during their plot to kill another who they view as evil.  Rick kills Shane after they thought he killed Randall, and the Governor killed Meryl after evryone thought he gave up Michonne.  Just a thought I wanted to share.