>Like USA’s other crime series, In Plain Sight keeps the tone light, but star Mary McCormack still has the grim bemusement of a noir heroine. Good for her! In the fourth season (premiering May 1), U.S. Marshal Mary Shannon tries to rally some wedding-planning enthusiasm on behalf of her engaged sister. When she reads a bridal magazine, it’s a breakthrough: not hearts and flowers, but at least there’s heart.