In pursuit of Marisol's killer, Horatio and Delko go to Brazil to avenge her death. Back in Miami, Natalia struggles with her first case as a field agent.

The team must investigate when Calleigh is run off the road into a canal, compromising crime scene evidence she just collected.

After a celebrity is murdered at an A-list party, the CSIs uncover a counterfeit ring producing hundred dollar bills. The Show's 100th Episode!

When a male model is murdered, the CSIs must enter the high stakes world of modeling in order to find the killer. Rob Estes guest stars.

After an entire neighborhood learns that they are being forced out of their homes, the local politician supporting eminent domain is murdered.

As Halloween approaches and the CSIs investigate a strange case involving voodoo, the team is spooked when bizarre accidents start happening around the lab.

When a man is decapitated while doing a daring stunt with his car, the team suspects that it was more than just an accident.

A kidnapping case becomes personal for the CSIs when the victim turns out to be Boa Vista's sister.

After a young woman is murdered at a charity event, Horatio uncovers a deadly plot against the City of Miami.

When a Marine recruiter is murdered, the CSIs must delve into the world of enlisting soldiers and the families they leave behind to solve the crime.

The team must find a suspected terrorist who goes on the run after a failed attempt on her life.

When Natalia's ex-husband is murdered, evidence suggests that she killed him.

Det. Frank Tripp's life hangs in the balance when he steps on a land mine while investigating a crime scene.

The lives of two CSIs are put in danger when Horatio’s old enemy, Clavo Cruz, returns on part one of a two-part episode.

In part two of a two-part episode, a member of the team is pronounced dead after being shot in the head.

The CSIs investigate when the parents of a baby sitter in an upscale neighborhood are murdered.

A men's hunting weekend turns deadly when one of the group is mauled by a bear and evidence suggests foul play.

When a wealthy real estate developer is killed, the CSIs suspect his wife and her two secret twin sisters.

When a murder victim is found scalped in a hotel, Horatio suspects that the County Supervisor and the owners of a nearby Native American casino are involved.

The CSIs investigate a celebrity rehab center where the therapeutic confessing of wrongs may have lead to a movie star’s murder.

Miami’s nastiest divorce becomes even worse when the husband’s mistress turns up dead.

When a CSI's personal problems taint an investigation, Horatio must fire a member of his team.

After a suspected carjacker is murdered, the CSIs learn that the victim may have been involved in drug smuggling off the shores of Miami.

When a serial killer suspected of killing young women and branding them with a 'Y' is caught and identified as having the "criminal gene," the team feels that they have closed their case until the killings begin again.