I just caught up with the whole of 3rd season, and they've done some amazing episodes so far. Even with Nathan missing this season (I had to watch the last ep of Season 2 and it's still not explained why he's missing), Rudy has been a great "replacement" especially with his power and comedy relief. The Nazi alternate timeline was mind-blowing. Female Curtis episode left my dick very confused. And the show just taught me how to steal a comatose patient from a hospital!
If you've never watched the show, it's basically normal people with powers like Heroes but not shit or losing its way.
I'm sure fans are going nuts over no Nathan, but I haven't checked those forums :P