C.S.I.: Crime Scene Investigation: Season 12

Under the direction of new boss D.B. Russell, the team tackles cases involving a wild shootout on a tram car, and a body dumped in an alleyway.

The team investigate a family massacred in their own home. The more they discover, the more confusing the case becomes.

Sara investigates a murder that mirrors an old serial killer case she worked years ago. Morgan works with Doc Robbins to determine cause of death for a victim who appears to have died in an impossible way.

The former Las Vegas mayor is shot during the grand opening of a new mob museum, and a maid is killed in the hotel room of a Middle Eastern prince.

Russell, Greg and Morgan catch a murder case where the victim is no longer dead when they arrive at the scene.

The team investigates the murder of a women who's body shows signs of long term torture.

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

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

As CSI and the FBI work together to solve the murder of a gunrunner working for a private defense firm, they discover that hundreds of very dangerous black market weapons may be out on the street.

When a genealogist is found dead in Dr. Robbins' bed, the team works on the theory that his wife may have been cheating even though she maintains her innocence.

The skeletal remains of three people are found in the desert. Initially beetle evidence implies they had been dead at least a week but other factors contradict that. They bodies were identified as a lawyer, that Catherine had a connection with, and his two employees. Catherine had recommended the lawyer to a friend, who was trying to escape her dangerous husband. After analysis the beetles appear to be genetically altered. Catherine fears her friend could be dead until she makes contact with a location.

Catherine goes into hiding with D.B. after Mark Gabriel's hitmen try to kill her, but they soon come to the realization that Gabriel himself may not be calling the shots.

When a "hair stalker" escalates to murder, CSI turns to his "muse" to identify a suspect before he claims his next victim.

D.B. turns to a "blood whisperer" from his past to help solve a crime involving a gunshot victim who has lost his short-term memory.

Three dysfunctional siblings fight over ownership of their deceased mother's house, while the CSIs investigate the disappearance of the wife of one of the siblings.

The team works against the clock to find a kidnapped boy, which becomes even more difficult when a blackout shuts down the entire city.

The team discovers that a WLVU student notorious for his gossip video blog was killed because he was about to expose a major campus scandal.

While the team tries to figure out a team of wedding bandits' next target before they strike again, Morgan pretends to be David's girlfriend to impress his mother.

The CSIs search for a killer who disappears from a locked-down casino.

A killer is about to go free because of a dirty cop, so the team tries to connect him to an earlier crime to keep him in jail.

A vehicle explodes during an off-road race, killing the driver, the team is called in to search for the missing co-driver.

While at a campaign dinner for the Sheriff, the team are called to a triple homicide nearby.