In the aftermath of the showdown against Arthur Petrelli, the Petrelli brothers find themselves battling against one another and Nathan makes a move that will have global repercussions. Meanwhile, Sylar holds Claire, H.R.G., Meredith and Angela hostage at Primatech and a face-off ensues. Elsewhere, Ando, Matt and Daphne continue their attempts rescue Hiro -- and Dr. Suresh may be their only hope.