The team believes that the murder of an American college student and abduction of his brother is being orchestrated by a local gang. Meanwhile, Jack is reunited with Ananda Doshi, an unorthodox profiler, to help with the case.moreless
The team heads to Cuba to hunt down a possible spree killer after the bodies of American victims are found in multiple areas.
The team heads to Morocco to search for a missing couple who were visiting Casablanca on a cruise.
A group of protesters breaks into the NYPD precinct after the police are suspected of killing an unarmed man. Mac and Flack find themselves caught up in the chaos as the team makes a fast move to try and solve the case. On the personal side, Mac contemplates his future with Christine.moreless
At Valentine's Day the CSIs get a taste of both the sweetest and the sourest that life can offer as they work on three twisted tales of love gone wrong.
The CSI crew investigate the murder of a con man who's been selling counterfeit bottles of a rare wine for millions of dollars; Mac shows up from NY for a romantic weekend with Christine, who appears to have vanished from her hotel room, which is the scene of a crime...moreless
A couple of graffiti artists, who vandalize their district using the tag 'Murderer', will find their sign a very close reality when a body is dumped at their feet.
The CSIs lead an investigation after the body of a masked man found at the bottom of a notorious skyscraper adds to the mysterious count of deaths that form part of the history of the building. Meanwhile, Jo runs into a stranger with an unexpected link to her past while enjoying a day off.moreless
The CSIs with the always difficult task of working a case where an officer has been shot: talking to the family, processing the scene and getting to the bottom of the truth. The case is particularly hard on Lindsay who has strong and fond memories of the victim.moreless
Two men are found dead with a common feature: both have been killed using unconventional methods. Meanwhile, $1 million anonymous checks are left around the city by someone known as the Guardian Angel.moreless
The co-owner of a popular bar is found dead. Meanwhile, Adam is forced to come to terms with his past so he can look ahead.
Detective Lovato's past as an undercover officer tangles up with her present duty when one of the gang members she ingratiated herself in and developed feelings for turns up tortured and killed.
The murder of a man named Luke leads the CSI team into the world of performance enhancement drugs; Lindsay is forced to revisit a hurtful past upon returning to Montana to witness the execution of Daniel Katums.moreless
The CSIs realize that the latest bodies discovered answer to some psychopath reenacting the game of CLUE in real life.
The CSIs discover the body of a woman dressed in a ballgown after draining a lake in search of a murder weapon. Adam entertains two little girls who are stuck waiting for their mother at the NYPD bullpen with a tale of intrigue.moreless
An cold case unsolved for twenty years about the disappearance of a young boy suddenly heats up again when the main suspect in that long ago crime is found dead.
Lindsay becomes injured during the attempted murder of a political candidate. The CSI team race to catch the shooter and the events in the aftermath lead to a child's death.
When evidence surfaces in form of several pictures at a crime scene on the Brooklyn Bridge, the CSIs rush to San Francisco to search for a 16-year-old girl who might be dead already. The case hits home for Jo.moreless