Sendhil Ramamurthy Mohinder Suresh Actor Milo Ventimiglia Peter Petrelli Actor Adrian Pasdar Nathan Petrelli Actor Hayden Panettiere Claire Bennett Actor Ali Larter Tracy Strauss, Niki Sanders, Jessica Actor Noah Gray-Cabey Actor Santiago Cabrera Actor Tawny Cypress Actor Masi Oka Hiro Makamura Actor Greg Grunberg Matt Parkman Actor Erick Avari Guest Star Jack Coleman Mr. Bennet, HRG Guest Star Rena Sofer Guest Star Nora Zehetner Guest Star James Kyson Ando Masahashi Guest Star Graham Beckel Guest Star Zachary Quinto Sylar Guest Star Cristine Rose Angela Petrelli Guest Star