That's not exactly what he said. We can assume that from Peter's mom's dream, but even her previous dream was changed due to Peter's actions. I think we're going to find that there's more to it then even that. I almost wonder if her head could've been reattached at that point. That would make her truly immortal and "you can't die" would then be a fully true statement.

I loved the season premiere though. I'm just wondering how Peter plans to "fix" everything. Hiro was able to delay it, but so far no one's been able to keep it from happening (referring to Sylar and Claire). I would think he could go back and tell himself to let Claire come to Texas, but there's no way of knowing if that'll really "fix" everything.

Did Claire really think she'd be able to shoot him at the beginning? That scene played out exactly the way I thought it would (accept I didn't know it was at the beginning).