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 Jack Coleman Mr. Bennet, HRG Actor George Takei Guest Star Christopher Eccleston Guest Star Jessalyn Gilsig Guest Star Saemi Nakamura Guest Star James Kyson Ando Masahashi Guest Star Ashley Crow Guest Star Thomas Dekker Guest Star Paula Newsome Guest Star