that picture looks like peter to me.
but in the Official Episode Summary thingy for next week( episode 9) it says that Hiro goes to the past and finds a shocking self discovery. Shocking to me means he knows the person. and there is only 3 people it could be in my mind. peter helping adam, but the whole timeline of that just doesnt seem to work for me but it is definetly possible, but he can either knock him off and fly away or land heal and walk away. Next is adam obviously this would be a shock bc in Hiro's mind he's probably dead, even tho he can regenerate i just think in Hiro's mind he thought it was over, so that would be a shock, and he would just be fall over and then heal. and the last is Hiro which i totally doubt, but some1 said it could have been him trying to save him but i totally doubt it. so to me its gotta be adam or peter. but we'll find out next week! cant wait this show got really good the last 2 episodes.