Morgan, Sara and Finlay try to relax at a forensics conference, but their getaway is disrupted by a mass shooting that occurs on site.
A chemistry teacher's science experiment goes horribly wrong.
Season 15, Episode 3
Sara and Greg are quarantined after responding to the scene of a murder that is contaminated with a deadly pathogen.
Season 15, Episode 2
The CSIs investigate a robbery and fatal shooting at a medical marijuana shop.
Season 15 begins with Finlay dealing with a bomb planted in her car. Meanwhile, Russell receives a call from someone who claims to be the Gig Harbor killer.