From Heroes Wiki
John Prosky is the American film and television actor who plays Micah's principal.
John is a veteran of film, theatre, and television. His numerous television credits include L.A. Law, Life Goes On, My So-Called Life, Star Trek: Deep Space Nine, Frasier, The Practice, The X-Files, The West Wing, NYPD Blue, Charmed, 24, House, Grey's Anatomy, CSI:NY, and Veronica Mars. His film credits include The Nutty Professor, Bowfinger, and A.I.
John has appeared alongside a vast number of other Heroes actors—with Richard Steinmetz in Late for Dinner, with Rick Scarry in Aurora: Operation Intercept and Any Day Now, with David Barrera in My Little Assassin, with Roxann Dawson and Josh Clark in Star Trek: Voyager, with Brad Greenquist in Star Trek: Voyager, with Greg Grunberg and Ian Gomez in Felicity, with Missi Pyle and Jesse Corti in Bringing Down the House, with Stan Lee and Jesse Corti in Hulk, with Malcolm McDowell in Hidalgo, with Eugene Byrd and Archie Kao in ER, with Ian Gomez and Eric Roberts in The Last Shot, with Matthew John Armstrong and Milo Ventimiglia in American Dreams, with Adrian Pasdar in Judging Amy, with Stacy Haiduk in Jane Doe: Til Death Do Us Part, with Kristen Bell, Francis Capra, and Tessa Thompson in Veronica Mars, with Jessalyn Gilsig in Nip/Tuck, and with Barry Shabaka Henley, Paula Newsome, Omid Abtahi, and Conroe Brooks in FlashForward. He also did voicework on the video game L.A. Noire with Greg Grunberg, David H. Lawrence XVII, Kate Connor, Jared Ward, Benjamin Byron Davis, Ron Perkins, John Thaddeus, William Charlton, Wiley Pickett, Michael Silver, Ned Vaughn, Andrew Connolly, Dusty Sorg, and Ryan Smith.