Wow, interesting way to take a 6 week hiatus. More questions than answers at this point.
Lets start with Eden's death, thats just plain stupid. She is the reason for Sylar escaping. But she smartly killed herself before he could gain a power that would almost be better than Claires' (I mean come on, all he'd have to do is say "Kneel before Sylar".
And with Peter, was it just me, or does anyone else think that the scar that Hiro was refering to, may be the key to keeping Peter from combusting? Also saving the cheerleader may just save his life. If they can get in a shelter or something, she may be able to withstand the blast and keep him alive. Or Claire's dad may have some sort of power after all.