Question: Towards the end of the episode but before the climatic battle between Sylar and Peter, Sylar, disguised as Nathan through the power of illusion, walks calmly towards Peter and then reverts back to his own form/image. To my knowledge there are four people who are there to witness this: Peter, Matt Parkman and two unnamed SWAT officers with a battering ram. It is understandable if the two SWAT officers didn't see this transformation, but Matt? Surely he must have seen? He was a few feet from him, yet he didn't even bat an eyelid? Why is this? His superior transformed into a well-known killer.
Question: How exactly does Peter Petrelli acquire that pretty nifty looking facial scar, even though he's absorbed regeneration? Is it even explained?
Chosen answer: (POSSIBLE SPOILER WARNING) Peter lost his regeneration ability and can now only possess one power at a time. He may yet get the scar.
Wait but that future scene was after the future was changed.?
Answer: You are talking about two different Peter's. The "scarred" peter never met Claire until Hiro told him to do so.
Chosen answer: Simple, he changes the illusion for peter, but keeps the others thinking he is still Nathan, he can make different illusions at once.
shtevie
Yeah, but surely when the cameras were on him, and the whole world was watching, what happened? He cast the same illusion to 7 billion people?
Yes. He could drop the illusion for Peter alone whilst everybody else would still see him in his disguise.
lionhead