When Mac is shot, he finds himself in limbo between life and death and, as he fights for his life, it's up to his team to bring the shooter to justice.
The CSIs are called to a Brooklyn housing project to investigate the murder of a successful businessman who still felt the pull of his old neighborhood.
A wave of brutality threatens a small New York City community when a body is found dismembered and strategically left out on four street corners.
The CSIs find themselves immersed in the world of competitive video gaming when they discover a murder may be related to a high-stakes tournament.
When a lab tech is murdered in a case that has eerie similarities to a 1950's cold case, the CSIs get a glimpse into what goes on in the shadows of the lab.
When the CSIs investigate two seemingly unrelated deaths, their separate trails of evidence lead to a surprisingly connected conclusion.
The CSIs investigate when a role-playing game turns lethal, with one player falling victim to a bona fide killer and the other kidnapped and held for ransom.
A home invasion investigation becomes more complicated when the victim's family turns out to be less perfect than they originally seem.
A charred body turns into a hot mess for the CSIs when it appears a cage fighter has been murdered by his stalker.
When an important witness turns up dead, Jo is caught up in the dangerous investigation of the suspected rapist who was freed on her watch in D.C.
As the CSIs investigate the assassination of a judge, Jo comes face-to-face with a criminal from her past.
When news of a high school house party goes viral, resulting in overcrowding, a collapsed porch and a teenage girl's death, the CSIs must use social media to uncover the truth about how she died. Meanwhile, Jo's final case at the FBI returns to haunt her.
The CSIs investigate when a fraternity prank goes awry on Halloween and a pledge master is left for dead in an open grave.
The CSIs investigate when the recently paroled brother of a young basketball prodigy is implicated in a murder.
A night out for a friendly drink takes an unexpected turn when Danny and his rookie cops are caught up in a shooting.
When the body of a beautiful young woman is found in a stolen Ferrari, the investigation leads to a family of car thieves, but the CSIs must find the murderer before the rest of the family meets the same fate.
When an awkward teen is found dead, the team discovers that his efforts to win a sexy punk rock chick's heart may have gone a step too far.
On the 10th anniversary of 9/11, Mac and the team remember specific moments from that day that were indelibly burned in their mind.
