From cbs.com:
"CSI is a fast-paced drama about a team of forensic investigators trained to solve crimes by examining the evidence. They are on the case 24/7, scouring the scene, collecting the irrefutable evidence and finding the missing pieces that will solve the mystery. Gil Grissom, shift supervisor, heads the team of investigators at the Crime Lab in Las Vegas. The team includes Catherine Willows, a hard-working single parent with a checkered past and a teenage daughter she's raising on her own; Warrick Brown, a top analyst with insider knowledge of the gambling world; Nick Stokes, a true-blue stand-up guy who empathizes with victims via his own experiences; and Greg Sanders, the wacky tech analyst turned field investigator. The CSI team members also work closely with Capt. Jim Brass, the former chief, now assigned to Homicide, Dr. Albert Robbins, the ever-professional medical examiner and David Hodges, a lab technician with a specialty in trace and foreign-substance analysis."

Warrick is brutally shot and the CSI team works to find the perpetrator.

A woman plunges into a bus full of passengers and the CSI team is sent to investigate whether it was suicide or a murder.

Warrick's replacement, Riley, is tested in her first case with CSI investigating an artistic serial killer.

The CSI team must investigate the deaths of an armed robber dressed in a police uniform and the young daughter of a South American drug lord.

Gil asks Lady Heather for her help when he and the team are faced with a homicide that has an apparent connection to the S&M world.

An 8 year old boy, who is HIV positive, helps the CSI team try to find the person who killed his mother and uncle at a street party in Koreatown.

The team investigates the death of the wife of a man trying to live a new life while Grissom visits the Miniature Killer during her parole hearing.

The death of a young performer causes the CSI team investigate the crew of a singing competition show and an old night club.

Grissom tells the team that he is going to leave CSI, but a serial killer keeps him at his post a little longer.

Grissom has one last case to solve before he leaves the team for good.

Langston begins his new career as a CSI member when he works his first two cases involving a robbery and an arson murder.

The CSI team investigates the brutal murder of an FBI agent who worked to uncover a sex trade and human trafficking ring before he died.

The team investigates a dead wife and a murdered chicken restaurant boss.

A congressman is on trial for the murder of his lover and Langston has to testify.

The team investigates three separate murders that appear to be connected to one man.

Nick investigates the death of a young girl at a hotel in this episode guest starring Taylor Swift.

The team investigates a multiple murder scene and tries to locate two missing boys.

One of Langston's former students is murdered and the team investigates Mexican wrestlers Lucha Libradors to find her killer.

Nick and Riley investigate a skydiving accident while Ray looks into the death of a spiritual man.

A producer is killed at a sci-fi convention while Hodges fantasizes about Wendy.

Catherine reopens a case and has doubts if the criminal she put away is actually guilty.

The team learns that a series of unsolved deaths were actually caused by rabies and they track down the source to a tattoo parlor in Reno.

The team investigates when a biker who was stabbed to death in a biker bar turns out to be an undercover agent whose cover was blown.

Langston and the team investigate a murder that is linked to rare and valuable chips belonging to a legendary casino from the 1980s.

The team investigates a vehicular homicide involving a young actress. Sara returns to help Katherine with the backlog of cases. The lab is raided by unknown gunmen.