Deadly jellyfish are used as a murder weapon; a mysterious woman from Jesse's past returns.

When the CSIs investigate what caused a car accident, both drivers' darkest secrets are revealed.

Dr. Ray Langston (Laurence Fishburne), from the Las Vegas office, comes to Miami when a severed leg found in the Everglades is linked to a girl who went missing in Las Vegas a week earlier.

Team members investigate when a trio of volleyball players suddenly drops dead on the court; Calleigh's testimony against Delko threatens his future with the CSI unit.

Horatio must submit to a gunman's bizarre request in order to save hostages when the lab is attacked.

As Eric Delko's life hangs in the balance, Horatio finds himself reminiscing about the formation of the CSI team and how its members first met.

The CSIs re-create a night of bachelor party debauchery to solve a murder and find a missing groom.

Alexx Woods and Delko try to help the team stop a deadly outbreak in Miami.

When Miami's most-hated man is murdered, members of the CSI team search for the killer and hidden treasure.

Horatio tries to save Yelina; despite Calleigh's protests, Delko gets involved with his dangerous father.

The team investigates when a man is boiled alive; Julia spins out of control; a dark secret is revealed.

A seemingly normal family is targeted in a brutal grenade attack, leaving Horatio and the team to figure out why.

The murder of a reality star throws the CSI team into the scandalous world of a television dating show.

A murder case leads Horatio to discover that Ron Saris is alive and seeking revenge on Julia.

When Ryan is kidnapped, he is forced to betray Horatio and the team.

A home invasion turns into something more when the team discovers that the Russian mob is targeting the group.

Nothing is certain in the case of a flight attendant's brutal murder.

The CSI team makes a shocking discovery about its murder victim; Horatio tries to save his son from Julia's erratic behavior.

Pirates take over a yacht; Calleigh and Delko's relationship moves to the next level.

The team goes head-to-head with a defense attorney (Sean Combs) who might be involved in a murder cover-up.

Alexx Wood comes back when a murderer puts Ryan's and Calleigh's lives at risk.

A dedicated group of forensic investigators at the Las Vegas Crime Lab works to solve often-grisly crimes in Sin City. Heading up the graveyard shift (an appropriate term in this case) is supervisor D.B. Russell, a "Left Coast" Sherlock Holmes who devours crime novels. Members of Russell's team include Julie Finlay, Nick Stokes, Sara Sidle (the team's moral compass), Greg Sanders and Morgan Brody. The investigative team works closely with Capt. Jim Brass -- a seasoned detective who is a protector of CSI -- Dr. Al Robbins -- medical examiner -- and quirky lab technician David Hodges. Previous leaders of the group include Gil Grissom and Dr. Ray Langston.

Naval Criminal Investigative Service Special Agent Leroy Jethro Gibbs leads a group of colorful personalities in investigating crimes -- ranging from murder and espionage to terrorism -- that have evidence connected to Navy and Marine Corps personnel. The team includes witty ex-homicide detective Anthony DiNozzo, quirky forensics specialist Abby Sciuto, and the brilliant -- if insecure -- Timothy McGee. Dr. Donald "Ducky" Mallard brings his vast experience in forensics into play to help solve cases.

An elite squad of FBI profilers analyzes the country's most-twisted criminal minds, anticipating the perpetrators' next moves before they can strike again. Each member of the "mind hunter" team brings his or her expertise to pinpoint predators' motivations and identify emotional triggers to stop them. The core group includes an official profiler who is highly skilled at getting into the minds of criminals, a quirky genius, the former media liaison who manages to adeptly balance family life and the job, and a computer wizard.

Dr. Temperance Brennan, a forensic anthropologist who works at the Jeffersonian Institution and also writes books, has an impressive ability to read clues from victims' bones. Consequently, law enforcement calls her to assist with investigations when remains are so badly decomposed, burned or destroyed that standard identification methods are useless. Brennan is teamed with Special Agent Seeley Booth, a former Army sniper, who mistrusts science and scientists when it comes to solving crimes but who has developed respect for Brennan, both professionally and personally.

This groundbreaking series from executive producer Dick Wolf's "Law & Order" franchise chronicles the ripped-from-the-headlines investigations of the NYPD's Special Victims Unit. Led by courageous and compassionate Capt. Olivia Benson, this elite team includes Sgt Odafin Tutuola, Detective Amanda Rollins and Officer Katriona Tamin, who focus on finding justice for the victims of the city's worst crimes. Assisting them is ADA Sonny Carisi, who seeks justice for SVU's victims and survivors with precision and a passion to win.

This series is largely remembered for the stylish clothes Detectives Sonny Crockett and Ricardo Tubbs wore, the soundtrack, and its distinct visuals. But beneath the veneer is a surprisingly dark cop show. The cocaine boom of the 1980s framed many stories about drugs and murder, with Crockett and Tubbs often resorting to violence in the course of their work.