• Air date: 21 Sep '11 22 episodes
      The twelfth season of CSI: Crime Scene Investigation premiered on CBS on September 21, 2011, and concluded on May 9, 2012. It consisted of 22 episodes. The show was moved to Wednesdays at 10:00 p.m., following Criminal Minds.
  • List of Episodes (22)
    • 1. 73 Seconds

      21 Sep '11
      After multiple attacks on a public tram, the team has just one witness and a lot of questions.
    • 2. Tell-Tale Hearts

      28 Sep '11
      When three people confess to killing a family, the team must decide who is telling the truth.
    • 3. Bittersweet

      05 Oct '11
      During a date, Stokes discovers decomposing body parts in part of an art exhibit; D.B. Russell deals with a staff member confrontation.
    • 4. Maid Man

      12 Oct '11
      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.
    • 5. CSI Down

      19 Oct '11
      The CSI unit investigates when Frank, an apparent murder victim, sits up and needs help but is he just another victim?
    • 6. Freaks & Geeks

      02 Nov '11
      The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.
    • 7. Brain Doe

      09 Nov '11
      The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.
    • 8. Crime After Crime

      16 Nov '11
      Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.
    • 9. Zippered

      07 Dec '11
      The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.
    • 10. Genetic Disorder

      14 Dec '11
      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.
    • 11. Ms. Willows Regrets... (1)

      18 Jan '12
      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.
    • 12. Willows in the Wind (2)

      25 Jan '12
      The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.
    • 13. Tressed to Kill

      08 Feb '12
      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.
    • 14. Seeing Red

      15 Feb '12
      Russell seeks advice from a former colleague during an investigation into the death of a man's ex-girlfriend.
    • 15. Stealing Home

      22 Feb '12
      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.
    • 16. CSI Unplugged

      29 Feb '12
      When a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.
    • 17. Trends with Benefits

      14 Mar '12
      When a photo of a dead college student starts trending on the Internet, the team steps in to investigate.
    • 18. Malice in Wonderland

      21 Mar '12
      The team has few leads to go on when investigating a robbery-homicide at a themed wedding
    • 19. Split Decisions

      04 Apr '12
      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.
    • 20. Altered Stakes

      11 Apr '12
      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.
    • 21. Dune and Gloom

      02 May '12
      When a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.
    • 22. Homecoming

      09 May '12
      Season finale: 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...