In its second season, "Homeland" remained suspenseful, disturbing and riddled with surprises. It mined drama from possibly the most damaged pair of protagonists, opponents and star-crossed lovers in TV history. Marine Sgt. Nicholas Brody (Damian Lewis) was a prisoner of war in Afghanistan who had returned home a national hero and soon-to-be-elected U.S. Congressman and, covertly, a terrorist turncoat. Carrie Mathison (Claire Danes) was a former CIA agent suffering from a bipolar disorder as well as emotional ties to the man she was obsessed with bringing down. They could have titled this series "Homeland Insecurity."