Possible spoilers for the beginning of Heroes Volume 5: Redemption.

So. Last season, Nathan Petrelli died and Matt Parkman telepathically brainwashed Sylar into believing he was Nathan, and since Sylar can change his appearance, as far as anyone can tell, he may as well be Nathan.

Now, Matt has a version of Sylar living in his head like Harvey, the neural clone of Scorpius living in John Crichton’s head in Farscape. This Sylar seems to be under the impression that he was pulled out of his body and put into Matt’s head. Meanwhile, “Nathan” seems to be exhibiting flashes of Sylar’s personality and powers.

In short, Sylar’s personality exists in two places:

• Matt Parkman’s mind, where he can interact with Matt.
• Sylar’s mind, where the personality is currently suppressed in favor of Nathan Petrelli’s personaility.

While I still think Sylar has long outstayed his welcome and should have been left for dead after the first season finale (they could have brought him back later with much greater impact if he’d been out of the picture for a year or two), I’m kind of intrigued by the possibility that the Sylar in Matt’s head might catch up to his body and find another version of himself occupying it…because I don’t think he’d be interested in sharing.