I loved how this episode put the focus on the killer, rather than CSI. The entire episode was well written and well played out. It kept me interested throughout the whole episode.
I loved the last scene, with Paulie blowing the safe and getting to safety. In fact, I was basically shouting at him to run, instead of just watch the police cars, as I wanted him to get away. Very few episodes make it so you want the killer to get away so this episode was special.
Then, it turned out that it was a fantasy and the door of the safe actually crushed him to death... Ah well, what an unlucky guy.