Steel_Wind said:It's the point where Peter uses Hiro's ability to reverse time and undoes what has been done.
I think this the most likely result.
I think it would be really, really cheap for them to allow Peter that power before Hiro is able to do it himself. Hiro tried like the devil to reverse Charlie's death, and failed, leading to the crisis of self-confidence that has nigh robbed him of his powers.
If they have Peter just whip that off like it was easy, they'll just need to kill Peter, because he'll be the worst sort of munchkin for stealing other character's thunder.