CSI: Crime Scene Investigation: Season 12

Ray Langston is cleared of wrongdoing in regards to the brutal death of Nate Haskell after moving to Baltimore to be with his ex-wife. With the CSI department still in chaos following the Haskell case that led to Ray's departure, the LVPD bring on-board its new supervisor from Seattle, D.B. Russell; and Ecklie's daughter, Morgan Brody, who since left her SID position in Los Angeles. Their first case: a crazy, chaotic shoot-out on a hotel tram that leaves two people dead, almost no witnesses, and

Following a grisly murder that killed a family of four people, a trail of blood led to a neighbor across the street who was spying on one of its victims: a little girl. But after Brass and Willows extract a confession out of the suspect, Russell is skeptical that he committed the murders. Complicating the matter was that two other suspects came forward, saying that they committed the murders, leaving the CSIs to determine who is telling the truth.

While on a date with Doc Robbins' niece, Nick realizes a piece of found art at an exhibit has decomposing body parts in it, which leads to a full-blown investigation stemming to an older, since-closed case involving a woman who kidnapped and killed young girls. Russell would soon decide to take Sara off the case, due to bias issues connected with her involvement in the old case. Meanwhile, Brody and Sanders find an obese man who drowned in a vat of chocolate, later to find out that years before,

Former Mayor of Las Vegas Oscar Goodman is shot at the grand opening of the Mob Museum and the CSIs embark on a history lesson in search of clues; one of the suspects was a henchman for the late Lou Gedda's crime syndicate - who resurfaced in public view after thirty years. Meanwhile a maid is found dead in a hotel room, stabbed in the eye with a swizzle stick.

A man left for dead in the desert by a local street gang is transported to hospital in a medevac helicopter with Morgan on board. However, he hijacks the chopper and orders it to fly towards Mexico, out of fear that the gang is still out for him to make sure he stays dead.

After the seemingly sadist torture/murder of popular sideshow performer Rachel Grier (aka Femmistopheles), the team goes behind the scenes of the carnival freak show to find her killer. They speak to her niece Silvia Grier who had seen her a few days before she died, and to Rachel's estranged sister Dr. Jennifer Grier.

Following a bizarre multiple car crash in front of a fast food joint that took the lives of three drivers, the CSIs discover a human brain that does not belong to any of the victims - it was supposed to be donated for research. Also, one of the wrecked vehicles had a football stashed in the trunk, though its owner's intent had nothing to do with sports. Meanwhile, D.B. Russell's son is in trouble at school when he was suspended from his basketball team. Sheriff Sherry Liston recommends Willows t

When the CSI team investigates three seemingly unrelated murders, the death of a successful businessman found dead on his large birthday cake, a gang member burned to death inside some car tires, and a woman killed in a motel by being forced to take PCP, they discover someone is getting revenge for cold case murders that were never solved. The suspect would later be found to be Sam Vega, a longtime LVPD detective who was hired by a former police detective (and a friend of Brass) who desire to se

The murder of a retired Army Ranger brings the FBI in on the case, to Russell and Catherine's initial chagrin. The CSIs and the FBI discover that a shipment of military grade machine guns have been stolen from the Middle East and made its way to Las Vegas. Catherine also reconnects with an old friend, Laura Gabriel, who was revealed to be involved in the case.

When Dan Traxler's dead body turns up naked in the bed of Doc's wife Judy, CSIs must "work the scene" for "Doc Robbins, coroner, not Doc Robbins, husband," while setting aside obvious assumptions of death-during-adultery. When it is discovered that Traxler was working for genealogist Donna Hoppe in creating a family tree for Doc, Donna and Sanders use genealogy records to locate the murderer, who turns out to have been conceived by incest when his mother Eunice Duggan raped his then-teenage brot

(Part 1) Catherine's friend Laura Gabriel's mogul husband Mark has a lot to hide behind his successful international corporation, and he has hired a crack team of assassins to carry out the murders of anyone who might be aware of what he is doing – and that includes Laura's lawyer and Laura herself. With the CSIs digging deeper into the case, they too - especially Catherine - find themselves in the crosshairs.

(Part 2) Catherine and Russell rely on her connections from her old stripper career in order to escape Mark Gabriel and his hitmen. Once they made it back to headquarters, Russell has a plan to catch Mark - fake Catherine's death. At the end, Catherine announces her resignation from the CSI unit to work for the FBI.

The CSI team investigates a series of murders by a serial killer who uses hair that he covertly cuts off as a "hit list", then paralyses and kills his victims while dressing them up in 1970s fashions, to resemble a loved one who died of cancer in the early 1970s.

As Nick and Morgan enjoy Mexican food on their lunch break, they witness Wes Clyborn driving into an advertising van. He survives his injuries, including two gunshots. Russell enlists a former colleague, "blood whisperer" Julie Finlay, to assist on a case involving the death of the Wes' ex-girlfriend, and the blood spray coming from four different people. After the case is solved, Russell invites Finlay to work with him as part of the CSI crew; will she accept the offer?

As Finlay begins her first day as a CSI, the team examines an unusual case: the theft of an entire house. After they located it, they discovered something sinister within its walls - a dead body.

As the CSIs were examining a murder-kidnapping case involving a young child, a thunderstorm took down the power grid in half of Nevada, including Las Vegas and CSI headquarters. The CSIs resort to manual, old-school methods on battery power to gather answers on who the perpetrator was, and to find the child before it's too late.

During a frat party, party-going students were discovering a photo of a dead student, shown to have leapt off a bridge, trending on social media. The CSIs find the student who posted the picture, and determine if it was truly suicide at all.

When the CSI team is called in to investigate a robbery-homicide at an "Alice In Wonderland"-themed wedding that took the life of the groom, they have little to work with to find a killer. After another wedding robbery soon after, they discover that some things come in threes. David's mother Olivia Hodges comes to town, and he wants her to believe Morgan is his girlfriend.

A casino is locked down immediately after a man is shot by an assailant. But even with advanced facial recognition technology, the murderer escapes the crime scene. CSIs track down three identical suspects, Xavier Marx, Kevin Chance and Jordan Brentson, who are biological triplets by means of in vitro fertilisation. Matters are complicated further when Jordan's lawyer arrives; his mother, Vivian Brentson. With three sets of identical DNA, the team must rely on antibody profiling, which points to

As the CSI team played the vice squad in a friendly softball match, Nick cut the game short when he learned from Brass that a man he helped put in prison, with connections to the late detective Sam Vega, is going to have his conviction overturned. The CSIs needs to prove the killer is guilty again or he will be released. Also: Hodges developed an affinity for Italian culture after a recent trip to Italy.

During a dune buggy race in the Nevada desert, a team encounters a burned out dune buggy with a dead body inside, with his surviving teammates leaving the race in a hurry. The CSIs determine who was involved in the disaster.

When a friend of Sheriff Liston becomes a prime suspect in his wife's brutal murder and the murder of two others, the investigation's political fallout reveals the truth behind Russell's troubled history with Finlay. It was later revealed that an old foe of the CSIs, former undersheriff Jeffrey McKeen, was calling the shots from prison and employing some of Lou Gedda's henchmen, leading to Sheriff Liston to announce drastic reforms of the LVPD in order to rein in corruption among the ranks. Frus