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Nick examines the Mustang in the lab and finds that the volume has been turned down. He rolls up the passenger window and finds smudges on the outside that he later discovers is knuckle prints. Nick figures that Warrick normally likes to blast his music and that he would not roll down his windows for Pritchard. He figures that Warrick turned down his music to talk to someone else that he knew. Watch this episode on watch CSI online for free.

A young woman in her apartment receives a phone call while working in her kitchen. She hears a voice through the phone then goes to her bedroom, changes into a bathing suit and grabs her towel. She walks up to her balcony and puts down her towel on the bench. She steps on the bench then off the ledge, causing her to plummet to her death into a bus full of passengers.

After several victims are found dead while performing normal, everyday activities, the CSIs must find the reason as to why each of the victims remain upright after dying. CSI episodes can be watched online at iwatchcsi.com.

A murdered young woman who was tossed from a nightclub is found to have several blood types in her system during the CSI's investigation, and she is the daughter of a wanted drug lord by the FBI. The case becomes personal for Catherine when she discovers Lindsey was at the same nightclub with a fake ID.

Gil seeks the knowledge of Lady Heather when the CSI’s are thrust into the world of sexual domination for one upright man.

While the cops, stymied by the language barrier, try to question the crowd, Grissom, Riley and SuperDave examine the two victims, a male and a female. There's no ID on the female but the male is identified as Sung Bang, who was released from prison earlier that day. Grissom finds a pair of child's sunglasses on the ground and they're covered in blood drops, indicating the kid witnessed the whole thing.

The CSIs investigate a murder case in which the prime suspect from a murder case that occurred 12 years prior is the main suspect. Online CSI episodes can be found at iwatchcsi.com for free.

The team discovers a shocking link between the death of a popular singer and a singer from 50 years ago.

The discovery of a garbage bag containing a badly decomposed body leads CSIs to open up the case files of the infamous "Dick & Jane Killer", Nate Haskell. Eleven years ago Haskell went on a killing spree targeting at least seven young couples which he is now serving a life sentence. Unexpectedly, mito-DNA testing revealed hairs from the victim match Nate Haskell

Dr. Langston (Laurence Fishburne) has been brought onto the new D.J.K task force, at Grissom's request, as a Special Consultant; he helps Grissom get into the mind of Haskell even going to meet with the infamous serial killer to try and trick him into divulging the whereabouts of the missing woman. Soon the CSI team identifies the suspect and finds the location of the home where the killer has taken the missing woman to torture her. Watch free CSI episodes online at iwatchcsi.com.

Dr. Langston's first day as a CSI is anything but easy when a seemingly simple burglary case ends up overlapping with an in-depth homicide and arson case.it's the first day on the job for Langston (Laurence Fishburne) as the newest CSI team member. While initially thinking his first day would include only a simple burglary call, he and the team are soon called to solve an arson and homicide case iwatchcsi.com, the ultimate community to watch CSI online.

Federal Agent William Ray Hatford is murdered in a bathroom at a gas station. His cohorts, Miles Beckman and Emma Stanley, call Las Vegas PD. Catherine and Ray Langston join Brass at the scene, where they discover a particularly gruesome crime scene awaiting them in the bathroom. One of Hatford's arms is found severed from his body, while Langston discovers a bloody lump of muscle mass by one of the toilets.

Langston and Nick are called to investigate a murder at a fast food restaurant and have quite a task ahead of them when they discover that much of the evidence is coated in cooking oil.It's a bad night at fast food restaurant Choozy's Chicken: the signature chicken statue crashes through the restaurant's window and Bob Graham, the head manager is found dead in the kitchen. Watch this episode on watch CSI online for free.

Ray Langston is testifying in the murder trial of Congressman Edward Griffin, who stands accused of murdering his mistress, Amber Jones. Amber was found shot three times in her house. The Congressman owned a Beretta 92, which he claims he discovered missing when the CSIs came to his apartment with a warrant for the gun. The proceedings are interrupted when a gunshot sounds outside the courtroom.

Ray Langston gets some help from Wendy Simms at the scene, who notices Carsten's cat, Gareth, licking pieces of a shattered vase in the studio housing Carsten's art collection. Darcy tells Brass that Carsten fought with a guest at the party before abruptly kicking everyone out. Viewing footage from Carsten's surveillance camera. Watch free CSI episodes online at iwatchcsi.com.

The CSIs are called to a murder at an all too familiar hotel where Nick has difficulty putting together the pieces of three separate murder investigations that took place in the same place.

Langston and Riley find themselves taken hostage during a shootout in a typically calm and quiet Las Vegas community. Watch this episode on watch CSI online for free.

When a grad student, formerly one of Ray's charges as a professor, turns up dead, he takes a personal interest. The trail leads to the world of 'Luchadors', Mexican semi-pro wrestling, and the grad student's death may be the result of her investigations into the history of a serial killer. Did she find him in the Luchador world, only to be murdered by him?

The CSI's investigate a sky diver paralyzed after free falling. As the investigation moves on, the team finds out that he is linked to similar murders of two wealthy men.

When the producer of the reboot of a classic SF show is murdered at a Las Vegas science-fiction convention attended by both Hodges and Wendy (both, unknown to each other, fans of the original show), they find a connection with each other as the team investigates the crime.

When a murderer claims that the CSI team used faulty evidence when the verdict was reached, Catherine re-investigates the case, which happens to be one of her very first cases as a CSI. Watch this episode on watch CSI online for free.

While investigating several random deaths around the city, the CSI's start to think that an odd outbreak is the reason for the deaths. Later on, they find out that if it isn't under control by anyone, it might lead to a big citywide epidemic.

The team investigates the death of an undercover cop, who destroyed a motorcycle gang, at a biker bar. The investigation reveals that he was killed by the gang because his real identity was exposed, but that's not the big problem. Evidence starts to link Brass with the victim's widow. Free CSI episodes at iwatchcsi.com allows you to watch CSI online for free.

In the 9th season finale, the team investigates murders that seem to be linked to some sort of scam involving unusual poker chips from a bygone casino. Also, Ray has to use lethal force for the first time on the job.