Greg Grunberg was always willing to lend an ear to his friends as the innovative Sean Blumberg on Felicity (pictured). Or dole out advice to his coworkers/friends as witty agent Eric Weiss on Alias. So it's only fitting that Grunberg's Heroes character Matt Parkman is a good listener. No, a really good listener: He can hear the thoughts of people around him. Too bad, Sean Blumberg can't help him invent something to stop the feedback. And those pesky headaches....