While watching the episode, I seriously thought Adar was going to be Sauron. Still possibly could be, but I doubt it. I really do think that Halbrand is going to be evil, and it isn't obvious. However, the fact he really got, dare I say, Obsessed about blacksmithing, and how incredibly powerful he was fighting off those guys. He was breaking bones a bit easier than I'd expect. I was thinking he was an Aragorn type, but man, he was brutal. He's also pretty wise politically, better than Galadriel is.