Sylar Can't Be Stopped

In the latest episode, Agent Danko turns on Sylar and attempts to "kill" him by sticking a knife in the back of the head, the "sweet spot" that deactivates the ability to heal.

While Sylar goes down, he eventually does recover and pulls the knife out of his head. So WTF? As much as I think the show has greatly improved this half of the season over the last season, this new development really sets the show back.

You all know how I feel about characters who are too powerful, and now Sylar, who was already past the line, can't even see the line anymore. The line is a dot to him. With the weakening of Peter and Hiro, nobody is even close to on par with Sylar and now, there really is no way to stop him. The show needs to fix this, and fix it quick. Perhaps they will make all his powers unstable due to his shape-shifting. Whatever they decide they do, they need to do it before the character becomes too ridiculous.