Season 4
23 episodes
44 min. per episode
Where to watch
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A brilliant investigator battles personal demons while unraveling dark secrets in a city where every crime hides a deeper truth.
Episodes
The CSIs investigate the murder of a woman in a hotel room, and search for her husband, who has disappeared.
A grossly decomposed corpse in a bath tub is identified as frat student Daniel O'Hannissey. He was last seen in a bar, taking part in a brawl about team sports, but left apparently unhurt. Meanwhile, the serial couples killings investigation takes a sharp turn when both are murdered in their home, while the undercover police observation was diverted.
Fingerprints suggest a link between two home invasions, but it's hard to link either the victims or the logical suspects, who may all be innocent. The crucial survivor testimony proves the most tenacious problem. A toddler found and accidentally fired a murder weapon in the family's suburb garden. Its place is a mystery, being so overt and unrelated to the victim, a bounty-hunting has-been, until the team consults the sky.
During a week-log heat wave, corpses are found, mostly accidentally. A.D.A. Jeffrey Sinclair decides to 'make an example' of a workaholic father who forgot his baby-boy in his scorching-hot car with fatal result, but the team finds the couple lost a previous baby and may have murdered this one. Mark Young is missing since his teen date's fatal lake sports accident. A fat man on a crazy diet was electrocuted at home.
The discovery of a dead man in the wilderness in a fursuit leads to an investigation at the goings-on at a furry convention.
A team of Crime Scene Investigators (CSI's) work with the Las Vegas Police Department (LVPD) to solve crimes by using advanced scientific methods and technology in Las Vegas, Nevada.