here are several new set photos for s3....these are awesome...!!

http://heroesspoilers-odi.blogspot.com/2008/06/several-new-hq-set-photos-for-season-3.html

Awesome! But a lot of the pictures say "not found".

oooo i like it when people turn evil. it looks like they're both from the future. i wonder why claire wants peter dead?

The Pictures are also available on Digital Spy's Tube Talk

i think this is in the future because we've heard this might happen.

but the question remains, why?

maybe her wants to go back in time to prevent some event from happening and claire wants to stop him?
maybe he wants to go back and shoot nathan and claire doesn't want him to?

more set pics of future peter:

http://heroesspoilers-odi.blogspot.com/2008/06/more-set-pics-of-future-peter.html

I don't know who he's talking too, but he looks like a mini version of Peter.

Yeah that's what I thought at first, but as you said - they're not wearing the same clothes.
Maybe Future Pete is leading some sort of gang.

It could be someone who helps teach actors how to do some low risk stunts on their own? It could still be the stunt double for Peter. They are in front of a green screen.