Season 12

1. 73 Seconds

After multiple attacks on a public tram, the team has just one witness and a lot of questions.

2011-09-21 • 44 min

2. Tell-Tale Hearts

When three people confess to killing a family, the team must decide who is telling the truth.

2011-09-28 • 44 min

3. Bittersweet

During a date, Stokes discovers decomposing body parts in part of an art exhibit; D.B. Russell deals with a staff member confrontation.

2011-10-05 • 43 min

4. Maid Man

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.

2011-10-12 • 44 min

5. CSI Down

The CSI unit investigates when Frank, an apparent murder victim, sits up and needs help but is he just another victim?

2011-10-19 • 43 min

6. Freaks & Geeks

The murder of a popular sideshow performer sends the team behind the scenes at a carnival freak show.

2011-11-02 • 43 min

7. Brain Doe

The CSI crew is stumped when they discover a disembodied brain at a crime scene where all the other brains are accounted for.

2011-11-09 • 44 min

8. Crime After Crime

Three new murders related to three unsolved (or incorrectly solved) crimes from the past come back to haunt the CSIs.

2011-11-16 • 43 min

9. Zippered

The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin.

2011-12-07 • 44 min

10. Genetic Disorder

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.

2011-12-14 • 44 min

11. Ms. 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.

2012-01-18 • 44 min

12. Willows in the Wind (2)

The CSI team says goodbye to Catherine Willows as she makes a life-changing decision.

2012-01-25 • 44 min

13. Tressed to Kill

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.

2012-02-08 • 44 min

14. Seeing Red

Russell seeks advice from a former colleague during an investigation into the death of a man's ex-girlfriend.

2012-02-15 • 43 min

15. Stealing Home

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.

2012-02-22 • 44 min

16. CSI Unplugged

When a blackout cripples the city, the CSIs must revert to old-school methods to solve the case of a missing child.

2012-02-29 • 43 min

17. Trends with Benefits

When a photo of a dead college student starts trending on the Internet, the team steps in to investigate.

2012-03-14 • 44 min

18. Malice in Wonderland

The team has few leads to go on when investigating a robbery-homicide at a themed wedding

2012-03-21 • 44 min

19. Split Decisions

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.

2012-04-04 • 43 min

20. Altered Stakes

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.

2012-04-11 • 44 min

21. Dune and Gloom

When a bomb kills an off-road race truck driver mid-race, the CSI team is called on the scene to investigate why.

2012-05-02 • 43 min

22. Homecoming

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...

2012-05-09 • 44 min