CSI: Crime Scene Investigation - Season 12

Multiple shootings and stabbings on a public tram leave the CSI team with one witness and a lot of questions.

Three suspects come forward with three different reasons why they killed an entire family and the CSI team has to determine who is telling the truth.

While on a date, Stokes realizes a piece of art at an exhibit has decomposing body parts in it, which leads to a full-blown investigation. Also, D.B. Russell makes a decision to ground one of the staff from the case.

The former Mayor of Las Vegas is shot at the Mob Museum and the CSIs embark on a history lesson in search of clues.

When a hijacked medevac helicopter with CSI Brody aboard goes missing, the entire team is on hunt.

When a Jane Doe is found near the freakish attractions of a 19th-century-inspired traveling sideshow, the team investigates a cast of unusual characters.

When the CSI team arrives at a car crash, they find three casualties and a human brain that doesn't belong to any of the victims. Also, D.B. Russell is concerned his son is not focused on college following his suspension from school.

When the CSI team investigates three seemingly unrelated murders, they discover someone is getting revenge for cold case murders that were never solved.

When the CSI team discovers a deceased rancher was also a ballistics expert, they have to work with the FBI to solve the case.

When the body of a naked dead man is discovered by Dr. Robbins' wife in their master bedroom, it leads to a lot of questions for the CSI team.

When Willows works with the FBI again after a professional hit occurs at a law firm she recommended to her friend, the CSI team identifies shocking similarities at the crime scene.

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

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.

Russell asks for advice from a former colleague on a case involving the death of a man's ex-girlfriend.

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.

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

The CSIs are brought in to solve the case of a recently murdered student whose death photo ends up trending on the Internet.

When the CSI team is called in to investigate a robbery-homicide at an "Alice In Wonderland"-themed wedding, they have little to work with to find a killer. Meanwhile, Hodges' mother comes to town, and he wants her to believe Morgan is his girlfriend.

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.

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.

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

The CSI team investigates three dead bodies just blocks away from a campaign dinner, they think they know who the killer is before making a shocking discovery.