3. Heroes -Adam Monroe
The Writer's Strike of 2008 inconvenienced a lot of shows, but when it came to "Heroes," it downright ruined it. With their planned virus storyline cut short, the writers were forced to come up with a last minute ending that ended up being the first step towards the series downfall. Still, one bright side of season 2 was the villain: the immortal Adam Monroe, who planned to restart humanity via a virus that would wipe out 93% of the world's population. He's stopped (obviously), and his former friend Hiro Nakamura locks him in a casket to spend eternity in...or so we thought. Unfortunately, that's the last we see of the cold and calculating Mr. Monroe. By season 3, he's been freed from his casket in exchange for helping Hiro and Ando find out who stole the formula to give people powers. All this leads to is Adam getting in a fight with a bartender, eventually slipping out the back door and getting knocked unconscious by super-strong baddie Knox. We next see him and Knox going to see the mastermind of this whole operation: Peter Petrelli's father Arthur who everyone thinks is dead, but is actually in a coma. Sadly for Adam, Arthur can take away powers from others, and when Knox forces Adam to touch Arthur, Adam's regeneration ability goes away, causing his 400 years on this Earth to finally catch up with him and turn him into a dust pile. This death sucked, period. We had a guy who had a unique view on life because he had been alive for so long, and as a master manipulator and calculating genius, he offered something different from other main baddie Sylar. Oh, and in case I forget, no, Arthur Petrelli did not turn out to be a better villain. He barely served as a character and was used more as a plot device, and not even a good one at that. If they had to use him, couldn't they have just taken some of Adam's blood to heal them. You had a guy who almost killed most of humanity, and you take him out like that?!?! Bad move, writers. Bad move.