1. House Bolton
2. Brotherhood Without Banners. They are loyal to the dead King Robert.
3. The non-book readers don't know who they are at this point. Some theories are that they were testing Theon's loyalty to the Iron Islands, but after he said that Ned Stark was his real father, they took him back to be tortured more. From reading several threads on the net, there's not a whole lot going on with his character for a few seasons. In fact, he disappears from the books until #5. His scenes are only in the show because they didn't want to keep him under contract for 2 seasons and not use him.
Thanks DEAC, I was wondering about question 1 and 3 as well....
1. Who the F is house bolton
3. what a waste....i don't care if they don't want to show him...i fall asleep during his scenes.