22 Episodes 2011 - 2012
Season 12 heralds the arrival of D.B. Russell (Ted Danson) as the team's new supervisor. In the premiere, Russell must help the CSIs investigate multiple shootings on a public tram. Also joining the cast for season 12 are Elisabeth Harnois (who plays Morgan Brody, a transplant from the Los Angeles CSI Unit), and Elisabeth Shue (Julie "Finn" Finlay), who replaces Catherine Willows when actress Marg Helgenberger departs the show mid season. Season 12 also contains several unique story lines including: a house being stolen off of its foundation, a hijacked medevac helicopter with a CSI team member on board and a car accident that yields three victims and a disembodied brain that doesn't belong to any of them.
Wed, Sep 21, 2011 60 mins
The 12th season begins with the lab getting a new supervisor (Ted Danson), who helps the CSIs investigate multiple shootings and stabbings on a public tram.
Wed, Sep 28, 2011 60 mins
Three suspects each confess to murdering a family and the CSIs must determine which one is telling the truth.
Wed, Oct 5, 2011 60 mins
Nick visits an art exhibit on a date and realizes that one work of art contains decomposing body parts.
Wed, Oct 12, 2011 60 mins
A former mayor of Las Vegas is shot at the Mob Museum and the CSIs embark on a Vegas history lesson to find clues to the crime.
Wed, Oct 19, 2011 60 mins
The CSIs search for a hijacked medevac helicopter that's carrying Brody as a passenger.
Freaks & Geeks
Wed, Nov 2, 2011 60 mins
The CSIs investigate when a woman's body is discovered near a freakish attraction at a 19th century-inspired traveling sideshow.
Wed, Nov 9, 2011 60 mins
A disembodied brain is found at the site of a car crash, but it doesn't belong to any of the victims. Meanwhile, Russell is concerned that his son isn't focused on college following a suspension from school.
Crime After Crime
Wed, Nov 16, 2011 60 mins
The CSIs investigate three seemingly unrelated homicides and discover that someone is exacting revenge for cold-case murders that were never solved.
Wed, Dec 7, 2011 60 mins
The CSIs work with the FBI to investigate the murder of a rancher who was also a ballistics expert.
Wed, Dec 14, 2011 60 mins
The CSIs investigate when Dr. Robbins' wife discovers a nude dead man in their master bedroom.
Ms. Willows Regrets
Wed, Jan 18, 2012 60 mins
Catherine works with the FBI to investigate a murder carried out by a professional hit man at a law firm she recommended to a friend.
Willows in the Wind
Wed, Jan 25, 2012 60 mins
Catherine makes the painful decision to leave CSI.
Tressed to Kill
Wed, Feb 8, 2012 60 mins
The CSIs investigate the murder of a woman found dressed in vintage clothes with a 1970s hairstyle. The probe points to a killer with a strange hair fetish.
Wed, Feb 15, 2012 60 mins
Elisabeth Shue joins the cast as Russell's former colleague, who helps him investigate the death of a man's ex-girlfriend.
Wed, Feb 22, 2012 60 mins
The CSIs investigate when a house is stolen from its foundation. Meanwhile, Julie displays her skills in blood analysis.
Wed, Feb 29, 2012 60 mins
A blackout cripples the city and forces the CSIs to revert to old-school methods to solve the case of a missing child.
Trends With Benefits
Wed, Mar 14, 2012 60 mins
A college student is murdered, and her death photo ends up trending on the Internet. The CSIs investigate and turn to social media to help solve the case.
Malice in Wonderland
Wed, Mar 21, 2012 60 mins
A murder and a robbery at an "Alice in Wonderland"-themed wedding are investigated. Meanwhile, Hodges wants his mother to believe that Morgan is his girlfriend.
Wed, Apr 4, 2012 60 mins
A man is gunned down in a casino at point-blank range, and the CSIs shut down the building to find the killer.
Wed, Apr 11, 2012 60 mins
A man Nick helped put in prison gets his conviction overturned and will be released, unless the CSIs can uncover evidence to prove he is guilty.
Dune and Gloom
Wed, May 2, 2012 60 mins
A bomb kills the driver of an off-road race truck during a competition.
Wed, May 9, 2012 60 mins
The 12th season concludes with the CSIs investigating the murders of three people whose bodies are found a few blocks away from the site of a campaign dinner.