This episode was great, particulary because of the way it was written. After watching the movie Casablanca a couple years ago, I have started to release how many tv shows use it as an allusion at some point in time.
The best part was how the allusions of Casablanca were dropped in throughout the episode, it was just like the movie! all put into a 20 min episode.
The storyline was good and the episode has to be given 10 out of 10 for me, mainly because it was much better than other episodes this season, the first few episodes werent all that great and I was lucky to keep watching, but it has been worth it, as these late season episodes have been good.