Horatio's life is changed forever when he learns important details about his deceased brother, and the team investigates when a woman is murdered at a crowded bar.
CSIs investigate when a young woman is murdered in the bedroom of a man who had won a day with her and another girl at a charity auction.
An IRS agent is killed while trying to repossess a delinquent taxpayer's yacht. Soon after, the CSIs discover a second IRS agent shot to death. Zac Efron guests.
An extreme skateboarder and video game tester is killed and the team must enter the highly competitive world of video game programmers and testers to find the culprit.