Ben (Michael Emerson) is considered one of the best villains on television, but he doesn't necessarily jump out as scary...at first. He's a genius manipulator and puppeteer, the former leader of the others who uses psychological warfare as a way to get what he wants. He's the man with the plan, although no one really knows what that plan is. Looking at him, though, he isn't that impressive. Who would be scared of the quiet, small Ben? The answer is: everyone. What makes Ben terrifying is that he can snap at a moment, and then be perfectly calm the next. One second he was sincerely talking John Locke out of suicide, and then he strangled him viciously moments later. He plead with Jacob to give him hope, and then stabbed his hero to death when he didn't get it. He took bloody vengeance on the man who killed his daughter, and then when it was pointed out to him that everyone on the boat would die because of it, he calmly said "So?" He is also responsible for the genocide of Dharma, including his own father. Ben Linus may seem meek and unremarkable at first, but he's unpredictable, brutal, and brilliant. Stay out of his games and you might just live.