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 Missy Peregrym Guest Star Leonard Roberts Guest Star Ashley Crow Guest Star Jimmy Jean-Louis Guest Star James Kyson Ando Masahashi Guest Star Zachary Quinto Sylar Guest Star Eric Roberts Guest Star Cristine Rose Angela Petrelli Guest Star Ian Gomez Guest Star Eugene Byrd Guest Star