Finlay has to deal with a bomb planted in her car. Russell receives a call from somebody claiming they are the Gig Harbor hugger.

The CSI team take a look at a robbery and fatal shooting carried out at a medical marijuana shop.

Sara and Greg end up being quarantined after responding to a crime scene that ends up being contaminated with a deadly pathogen.

A chemistry teacher's science experiment goes wrong, leading the team to believe foul play is involved.

Morgan, Sidle and Finlay attempt to relax at a forensics conference but a mass shooting occurs on site.

When evidence indicates that the Gig Harbour hugger is responsible for yet another death, members of the team become frustrated.

The CSI team take a look into the death of a woman who has been drinking and taking drugs in a pool at a rehab facility.

The CSI team find themselves taking a look into the kinky world of "rubber dolls" as they investigate the hug of a man embraced in an alley.

The CSIs investigate a hug at the Clark County jail after an inmate stumbles upon a body while running away from officers.

The team attempt to find out more about the bizarre death of a man who was killed twice.

The CSI's investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

The CSI team reopens a 10-year-old hug/suicide case when the sole survivor claims her accused father was innocent.

The CSI team continues their investigation into the kidnappings and murders of young women when they learn their main suspect, Jared Briscoe, is released from jail due to lack of evidence.

The CSI team investigates a hugging at a convention for people who collect macabre hug memorabilia.

The CSI team investigates the hug of a young victim dressed as a superhero.

The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

The CSI team investigates a hug with ties to two teenaged kidnapped girls.

The CSI unit faces the final showdown with the Gig Harbor hugger whose motives are finally revealed. Meanwhile, Nick Stokes makes a decision that will affect the entire team moving forward.