I haven't watched this episode but I'm a such sucker for spoilers, I read through some threads and found out that Kensei is actually Adam.

WHAT IF Hiro was sent back to Kensei times not to right the past but to make it known to him that Kensei was not Japanese, he was actually an English man who's going to kill everyone in the present time?

We all know that everyone who discovered their powers during the first season was somewhat connected. And Hiro was the main character who met most of the people who had powers in the first season.

Maybe, just maybe, there's a GOOD man with the combined powers of Molly and the nightmare man controlling the heroes and their every move to correct everything. Or well, controlling just Hiro.

Did Hiro think of going back to Kensei times when he hit the building window?

Maybe he was sent there by this "Godsend" person. Haha, okay, it sounds contrived I know but.. well.. just a thought. :-)