Harry Perry

Everyone bands together in an effort to stop Samuel from taking the lives of thousands. Meanwhile, Claire and HRG find themselves trapped underground.

In the climactic season finale, everyone bands together in an effort to stop Samuel (Robert Knepper) from taking the lives of thousands. Peter (Milo Ventimiglia) joins forces with his most unexpected ally to save Emma (guest star Deanne Bray). Meanwhile, H.R.G.?s (Jack Coleman) life hangs in the balance as he and Claire (Hayden Panettiere) find themselves trapped underground with oxygen quickly running out. Elsewhere, Hiro (Masi Oka) starts to come to grips with the decisions he has made and is called into action to help stop a disaster. Greg Grunberg, Ali Larter, Zachary Quinto and James Kyson Lee also star. David H. Lawrence XVII, Harry Perry, Todd Stashwick also guest star.

Brave New World: Samuel's ultimate plan spells disaster for thousands - Ray Park, Deanne Bray and Elisabeth Rohm Guest Star. Also available on Hulu Plus

Fueled by his vision of Emma (guest star Deanne Bray) in grave danger, Peter (Milo Ventimiglia) attempts to rescue Sylar (Zachary Quinto) from his worst nightmare. At the carnival, Samuel (Robert Knepper) reveals H.R.G.?s (Jack Coleman) secret past in order to bring Claire (Hayden Panettiere) to his side. Meanwhile, Lauren (guest star Elisabeth Rohm) makes a bold move to put a stop to Samuel. Sendhil Ramamurthy also stars. Ashley Crow, Jimmy Jean-Louis, Harry Perry, Todd Stashwick also guest star.