(S01E13) How about that opening sequence? Before the credits, the entire cast gets to take a shot at a locomotive big guy on PCP. He throws Elliot through a window, knocks out a kid getting off the elevator and even takes a taser shot to the gut from Olivia before Fin takes him out with a chair to the back of the head. Anyway, the entire action sequence was a pretty elaborate way to write Christopher Meloni out of this week's script.

And, how unusual was this episode? The first 40 minutes had us thinking the detectives were investigating their usual child porn case, but then suddenly Olivia passes out?!? That's when the episode takes a turn from child porn to a much headier subject of chemical companies testing their products on humans. Wha? It took me a little while to catch up with the detectives as they spouted out their theories on why people in a low-income apartment building were being gassed. For a while there, I thought the theory was hair-brained and another of Det. Munch's theories. But it just kept going.