and is he going to team up with Sylar? (he's not dead, I'm sure)
what i didn't expect was Nathan's unselfish act, but he could still be alive for all we know (he could've flown Peter out into the space, leave him to explode, then come back to retrieve what's left of his brother for him to regenerate...). i was more inclined to see either D.L. or Parkman to get the ticket home (though D.L's more expendable, methinks).