In the season finale, Ando fears his friend is powerless to keep him alive, so he steals Hiro's sword and goes after Sylar, himself. Nathan comes between Peter and Claire. Jessica tries to find her son after Linderman and D.L. get killed and finds Niki occupying the same space as herself. Mohinder does everything in his power to keep Molly alive, even though Noah Bennet wants her dead, thinking she's a missing link. And it all sets the stage for the showdown between Sylar and Peter.
—Moviedude1