This episode was very well written, just well done. Robin Williams was phenomenal! The few times I've seen him play a crazy person, he did an excellent job. It's unfortunate that Robin Williams has been typecast as a goofball because he so obviously has other talent.
I loved seeing what Benson and Stabler went through in this episode, especially at the end. I felt so bad when I thought Liv was being tortured. The look on Stabler's face when he heard her "screams" was almost too much to take. I was upset when Benson and Stabler let Rook get away but then I realized that they have to make their share of mistakes.
Rook really had everyone fooled. I couldn't believe how well he did in court. It was infuriating but at the same time impressive. This episode was very good. I'm very pleased with the outcome of this episode as it leaves an opening for Rook to come back next season.