Seasons & episodes
S12 · E173 Seconds 2011-09-21 · 44 min
After multiple attacks on a public tram, the team has just one witness and a lot of questions.
S12 · E2Tell-Tale Hearts 2011-09-28 · 44 min
When three people confess to killing a family, the team must decide who is telling the truth.
S12 · E3Bittersweet 2011-10-05 · 43 min
During a date, Stokes discovers decomposing body parts in part of an art exhibit; D.B. Russell deals with a staff member confrontation.
S12 · E4Maid Man 2011-10-12 · 44 min
The investigators attend the gala grand opening of a mob museum, only to witness an attempted hit on mob lawyer and former mayor Oscar Goodman.
S12 · E5CSI Down 2011-10-19 · 43 min
The CSI unit investigates when Frank, an apparent murder victim, sits up and needs help but is he just another victim?
S12 · E6Freaks & Geeks 2011-11-02 · 43 min
The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.
S12 · E7Brain Doe 2011-11-09 · 44 min
The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.
S12 · E8Crime After Crime 2011-11-16 · 43 min
Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.
S12 · E9Zippered 2011-12-07 · 44 min
The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.
S12 · E10Genetic Disorder 2011-12-14 · 44 min
When 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.
S12 · E11Ms. Willows Regrets... (1) 2012-01-18 · 44 min
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.
S12 · E12Willows in the Wind (2) 2012-01-25 · 44 min
The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.
S12 · E13Tressed to Kill 2012-02-08 · 44 min
When 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.
S12 · E14Seeing Red 2012-02-15 · 43 min
Russell seeks advice from a former colleague during an investigation into the death of a man's ex-girlfriend.
S12 · E15Stealing Home 2012-02-22 · 44 min
When 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.
S12 · E16CSI Unplugged 2012-02-29 · 43 min
When a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.
S12 · E17Trends with Benefits 2012-03-14 · 44 min
When a photo of a dead college student starts trending on the Internet, the team steps in to investigate.
S12 · E18Malice in Wonderland 2012-03-21 · 44 min
The team has few leads to go on when investigating a robbery-homicide at a themed wedding
S12 · E19Split Decisions 2012-04-04 · 43 min
When 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.
S12 · E20Altered Stakes 2012-04-11 · 44 min
When 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.
S12 · E21Dune and Gloom 2012-05-02 · 43 min
When a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.
S12 · E22Homecoming 2012-05-09 · 44 min
The 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...