I really liked the 'flashback' scene with Peter and Simone's father. Not sure how it happened, but that's not a big deal. The unconditional love that Peter had contrasted well with Sylar's possible suicidal motive to explode. One of the things that struck me in this episode was the resignation to fate that the characters had. Sylar knew he was going to die (you can argue with me all you want on this) so he made Peter go nuclear before allowing Hiro to stab him.
Kirby Square or what ever it was called did seem a bit empty, but I'm choosing to think that the Company had it blocked off from the public so they wouldn't interfere with the explosion. I did like the sculpture there as well. Certian shots of it from the side looked like a little mushroom cloud.
Noah. That's awesome.
I wonder if Peter can only use one power at a time? Is this why he didn't fly away himself. I'm hoping the brothers Pittrelli survived.
Slyar, judging from the blood on the pavement, is dead. It seems like he was dragged towards that manhole.
I am really excited to see Hiro's adventures in the past. I'm thinking that the solar eclipse that happens as he arrives neutralizes his powers and that he will have to stay and train there for a while.