Chances are they ran a new ep because they knew that a rerun wouldn't have done well and networks want to get the most eyeballs as possible. Even though the show was down from normal, it was still more competitive with what was on the other networks. And there's always the 7 Day DVR ratings. I'm sure I'm not the only one who didn't watch live on Thursday night. In fact, I've been so busy I still have yet to watch it...