Ep 17. XX

In season 4, episode 17 of CSI: Crime Scene Investigation, titled XX, the team at the Las Vegas Crime Lab is called in to investigate a string of murders involving young women who were all found suffocated. As the team delves deeper into the case, they discover that the killer, who is dubbed "The Suffocator", is targeting women who resemble his ex-girlfriend, who he believes betrayed him.

The investigation takes a personal turn for Sara Sidle (Jorja Fox) when she realizes that one of the victims may have been a former student of hers. Sara becomes emotionally invested in the case and is determined to bring the killer to justice.

Throughout the episode, the team uses their expertise in forensic science to gather evidence and piece together the killer's profile. They analyze DNA samples, footprints, and tire tracks, and use state-of-the-art technology to reconstruct the crime scenes and identify potential suspects.

The team also faces challenges as they navigate through the case. They must contend with a skeptical detective who does not believe in the validity of forensic evidence, as well as a victim's family who are reluctant to cooperate with the investigation.

As the case progresses, the team discovers a connection between the killer and a local appliance repair shop, and devises a plan to catch him in the act. The episode builds to a tense, climactic scene in which the team confronts the killer and brings him to justice.

Overall, season 4, episode 17 of CSI: Crime Scene Investigation offers an engaging and suspenseful mystery, as the team works against the clock to catch a serial killer before he strikes again. The episode showcases the team's unique blend of scientific expertise and investigative skills, and highlights the importance of forensic science in solving crimes.