Ep 8. Buzzkill

In CSI: NY season 4 episode 8 titled "Buzzkill," viewers follow the team as they investigate the death of a young woman found wrapped in a blanket and dumped in an alley. The victim, Sasha, was last seen leaving a popular nightclub with her friend Liz, who is also missing.

Mac and Stella kick off the investigation by processing the scene, where they find drops of blood and a discarded credit card belonging to Liz. They soon discover that Liz works for the drug task force, and may have been working undercover in the nightclub to bust a drug dealer.

As the team delves deeper into the case, they discover that Sasha was also working for the drug dealer as a prostitute, and that her death may have been a result of her trying to leave that life behind. Meanwhile, Danny and Lindsay process the physical evidence, which leads them to a suspect known as the "cheese grater killer," who targets women in the sex trade.

The investigation takes a surprising turn when they discover that the drug dealer and the "cheese grater killer" are one and the same person - a man named Ray, who was trying to eliminate anyone who threatened to expose his double life. Ray is eventually arrested and the missing Liz is found, alive and well.

Alongside the main investigation, the episode also explores the themes of identity and perception. The victim Sasha is revealed to have been a straight-A student from a wealthy family, who felt trapped in her life and turned to drugs and prostitution. Liz, who appeared to be leading a wholesome life as an undercover cop, was also revealed to have a secret life as a lesbian. The characters grapple with the complexity of how people present themselves to the world, and the discrepancies between appearances and reality.

Overall, "Buzzkill" is a gripping episode that explores the dark underbelly of the club scene, as well as the complex motivations that drive people to make questionable choices. With well-developed characters and a tight plot, it's an engaging and thought-provoking watch for fans of the CSI franchise.