Huh. That's a good point - Adam is stashed away! I didn't even think of that. That means he's definitely still available to give blood (heh, odd phrasing), if for some reason Peter's blood doesn't (which I would think it would). Must needs save Nathan. Peter, that is your mission. You have no choice but to accept it.

Or maybe Pete can just kiss Nathan and bring him back to life. Then we get kissing *and* Nathan. Perfect plan.