Season 12

2011 · 22 episodes

With new supervisor D.B. Russell at the helm, the CSI team continues to use its advanced forensic methods to crack the most baffling cases.

173 SecondsAfter multiple attacks on a public tram, the team has just one witness and a lot of questions.
2Tell-Tale HeartsWhen three people confess to killing a family, the team must decide who is telling the truth.
3BittersweetDuring a date, Stokes discovers decomposing body parts in part of an art exhibit; D.B. Russell deals with a staff member confrontation.
4Maid ManThe investigators attend the gala grand opening of a mob museum, only to witness an attempted hit on mob lawyer and former mayor Oscar Goodman.
5CSI DownThe CSI unit investigates when Frank, an apparent murder victim, sits up and needs help but is he just another victim?
6Freaks & GeeksThe murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.
7Brain DoeThe CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.
8Crime After CrimeThree new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.
9ZipperedThe murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.
10Genetic DisorderWhen a man's dead body turns up naked in the bed of Doc Robbins' wife, the detectives try to "just work the scene" without bringing their pre-judgments to the table, but it sure looks like a case of Death During Adultery.
11Ms. Willows Regrets... (1)Catherine's friend Laura's mogul husband Mark has a lot to hide behind his successful international corporation, and he's hired a crack team of assassins to carry out the murders of anyone who might be aware of what he's doing, and that includes Laura's lawyer and Laura herself.
12Willows in the Wind (2)The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.
13Tressed to KillWhen a woman is found dead and her hair is done up '70s style complete with vintage clothes, the CSI team discovers clues that point to a killer with a hair fetish.
14Seeing RedRussell seeks advice from a former colleague during an investigation into the death of a man's ex-girlfriend.
15Stealing HomeWhen a house is stolen completely off its foundation, the CSIs are on the case in search of answers. Meanwhile, new CSI Julie Finlay showcases her skill in blood analysis.
16CSI UnpluggedWhen a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.
17Trends with BenefitsWhen a photo of a dead college student starts trending on the Internet, the team steps in to investigate.
18Malice in WonderlandThe team has few leads to go on when investigating a robbery-homicide at a themed wedding
19Split DecisionsWhen the CSI team is called in to investigate a man who is shot at point-blank range in a local casino, they shut down the entire building to find their killer.
20Altered StakesWhen Stokes learns that a man he helped put in prison is going to have his conviction overturned, the CSI team needs to prove the killer is guilty again or he will be released.
21Dune and GloomWhen a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.
22HomecomingThe investigation of a triple homicide leads to the discovery of corruption running rampant throughout the LVPD. The closer they get to the truth, the more serious are the repercussions. To be continued...

Episodes