4 stars for me this episode. Every episode of Lost is excellent in my book, but I hate to rate every single one a 5 so I grade them against each other. This was the episode I liked the least so far this season, but it was still very good. I didn't get caught off guard by the twist at the end, as I actually considered Aaron might be the son during all the interaction between Kate and him during the episode. It seemed as though they were really trying to come up with a connection between the two characters. It was one of the more satisfying episodes in that it answered a lot of questions up front. Such as why Kate wasn't in prison, and who was the "he" she had at home. Also, kind of let us see part of why things were strange between her and Jack.