He did not appear in this episode at all, which was a little strange...

I think he may be off on assignments with meredith according to the newest graphic novel trying to catch the level 5 escapees

Yep, definitely. BUt it's kinda weird when everyone else is fighting alongside PInehearst/Primatech that HRG and Meredith are left behind, still hunting down those d*** Level 5 escapees who almost everyone else has forgotten about- now that even Claire is no longer hunting them down

Judging by the mysterious look of his face, it must have been something else than just a regular job. I wouldn't say that catching badguys is very unusuall in Noah's business. So they are up to something else.

I'm just waiting for Jack Coleman's Season 3 HRG "b****" quote.

I think maybe they are preparing something real good for him a real badass villain worst than the others

I want to see Noah with a power, ok kinda off topic.

I WOULD HATE THAT!!! Him and Ando are pretty much the only non-evolved humans left (now that even Mohinder has a power), and Heroes needs a fair share of non-evolved humans. The Company valued non-evolved humans just as much as they valued evolved humans- hence the "One of Us, One of Them" policy

Yes. There are not that many non evolved people left on the show and HRG and Ando need not have abilities.