I'm not sure I trust that it's Liam. They keep ending the episodes with Big Reveals, and then changing direction the next week. It would be exciting to me if the terrorist was Alex all along. That's what I want to have happen. As long as it's not Caleb, or Simon. I agree with others that I can't believe I like Caleb so much, since I couldn't stand him at the start of the series. Now he's my favourite, along with Simon. Except when Simon suddenly has a huge southern drawl...which comes out of nowhere? He was REALLY southern when he was in the cabin in Vermont. Guess he was just feeling all rustic and stuff. Not upset about Drew. He had the acting ability of a turnip. I have no idea what the deal with Iris is since she's not in the present time at all. Why does she matter? If they drag out this "who is the terrorist" plot for S2, I think I'll give up. Even Revenge got tiresome after the same thing happened over and over each season (I didn't even watch S3.) They need to wrap this arc up and start over. But from where? I don't know how they can keep this show going for another season? Maybe they'll just blow everyone up in the final episode and start fresh with a new class of recruits. heh.
