Jack Coleman Mr. Bennet, HRG Actor Greg Grunberg Matt Parkman Actor Robert Knepper Samuel Sullivan Actor Ali Larter Tracy Strauss, Niki Sanders, Jessica Actor James Kyson Ando Masahashi Actor Masi Oka Hiro Makamura Actor Hayden Panettiere Claire Bennett Actor Adrian Pasdar Nathan Petrelli Actor Zachary Quinto Sylar Actor Sendhil Ramamurthy Mohinder Suresh Actor Cristine Rose Angela Petrelli Actor Milo Ventimiglia Peter Petrelli Actor Elizabeth Rohm Guest Star Deanne Bray Guest Star Madeline Zima Guest Star Ray Park Guest Star Lisa Lackey Guest Star David H. Lawrence XVII Guest Star Dawn Olivieri Guest Star Harry Perry Guest Star Todd Stashwick Guest Star Daryl Crittenden Guest Star Erin O'Reilly Guest Star Kaleigh Ryan Guest Star