Being a good guy is overrated. Sure, you save the day and get the girl. But that gets old after a while. It's the villains who captivate and have us howling in laughter and cowering in fear — often at the same time. Which brings us to this motley crew. Where is Prison Break without its one-handed wonder? Guess which person on Heroes actually has the most brains? And just how is 24's Jack Bauer supposed to be tortured if there is nobody around to stab him in the shoulder blade? Battlestar Galactica might not even have a battle on its hands if it weren't for a certain lovestruck genocidal traitor, and no one acts uglier than Ugly Betty's cunning creative director. When it comes to arresting television, it is this bevy of baddies that keeps us in front of our TVs...under lock and key.