Ep 8. Happenstance

In CSI: Crime Scene Investigation season 7 episode 8 "Happenstance," the team investigates the death of a young woman found in a hotel bathtub. The woman was a drug addict and it seems like an overdose, but as the investigation unfolds, the detectives find traces of a lethal bacteria in her bloodstream.

The detectives soon find out that the bacteria came from a batch of counterfeit pills that the victim had been taking. The investigation leads them to a pharmaceutical company that is producing the pills. As they dig deeper, they discover that the company has been cutting corners and producing the pills with substandard ingredients.

Meanwhile, Greg is still dealing with the aftermath of being attacked in the lab. He is suffering from severe anxiety and is having trouble sleeping. As a result, he is making mistakes on the job and endangering himself and his colleagues. Sara takes notice of this and tries to help him deal with his trauma.

The investigation also leads the team to a group of drug dealers who are distributing the counterfeit pills. They track down one of the dealers and interrogate him, eventually getting him to give up his source. The detectives then raid the warehouse where the pills are being produced and shut down the operation.

The case takes a personal turn for Catherine when she discovers that the victim was the daughter of an old friend of hers. She struggles with her emotions throughout the investigation but ultimately finds closure when the killer is brought to justice.

In the end, the team is able to solve the case and bring the responsible parties to justice. However, the investigation takes a toll on everyone involved as they confront issues of drug addiction, pharmaceutical fraud, and personal trauma.