Also, didn't they say Hiro would die if he used his power one more time... and then he used his power one more time... and then he collapsed... and he was fine?
My issue with that is if Hiro was really intent on using it one more time you would think he would save it for a really important moment to freeze time. I don't think it was necessary to freeze time to stop Dank from injecting Noah who as far as memory serves he never really interacted with and never really knew his allegiance. Afterall Hiro moments earlier had seen he and Danko moving towards shaking hands. Frankly I would have used a brain hemmorhage to kill off Hiro.
I just have to say this: Sylar is (was) a magnificent villain.

Danko... hell, everyone on the show, is completely outclassed by him. The only way they can stop him, temporarily at least, is by working together. You'd think they would learn that already.
I didn't quite understand the point of Claire going to Nathan. What exactly would she be able to do to stop him if she discovered it really was Sylar? As we saw she was his puppet much like with Doyle.
I wonder how many will come back to the show next fall. Speaking for myself I'm on the fence. I have a strong feeling it will be pretty much the show it has been of late. I guess it also depends on what the fall schedule looks like and how many other shows I'll be watching as to whether Heroes will fall completely off my viewing list. As of now, it certainly doesn't look good for the show as far as this viewer is concerned.
When did Sylar absorb the ability to Fly?
I think he was levitating not flying.