Goran Ivanovski

When an off-duty diplomatic security agent is fatally shot in New York City trying to apprehend someone, the team investigate if there's a connection to his time working in Croatia.

After all the guests attending an upscale fundraising soiree for the science department at a local university fall ill, the CSI team gear up to investigate; Catherine enlists Grace's roommate to help her find clues after Grace disappears.

Catherine's frustration intensifies when a lead suspect in Grace's disappearance is found murdered. The team exhaust all their skills to figure out who killed the suspect, and if his death will lead them to Grace.