Continuity mistake: When Catherine tells Grisson she liked the tough act (while listening to the guy testify) he said too much, she said not enough. Then he glances over at her. The guy is talking, which indicates a continuous line, even though the shot changes, but Grissom is not looking at Catherine during the shot change, instead he's got his head leaning against the glass.
Continuity mistake: When Brown talks to David, David pulls out a pelvis from a vat of acid, saying he's cleaning it. In one shot the pelvis is hanging off the lower of the tongs, but in the next shot it's clamped between the tongs. This series of shots occurs a couple times during the conversation.
Answer: The episode on CSI:NY was called "Love Runs Cold" and first aired on October 4, 2006 (Season 3, Episode 3) and involves the investigation of a model found stabbed to death by an ice dagger.
OneHappyHusky