Delko is found comatose, and we are taken back to the year 1997 to when the team first formed.

Horatio takes point as the negotiator when an armed gunman storms CSI headquarters and takes hostages.

Three volleyball players mysteriously drop dead on the court while Calleigh's testimony against Delko threatens his future as a CSI.

When the most hated man in Miami is murdered, the CSIs go on the hunt for his killer and his hidden treasure.

Alexx Woods and Eric Delko return to help the CSIs stop a deadly outbreak in Miami.

Two groomsmen wake up handcuffed together and covered in blood, with no memory of the raucous bachelor party the night before. Worse, the groom is missing...

Horatio Caine calls Las Vegas CSI Ray Langston to come to Miami when a severed leg found in the Everglades is discovered to belong to a girl who went missing in Las Vegas a week earlier. The crossover continues on CSI:NY S06E07 Hammer Down (II) and CSI: Crime Scene Investigation S10E07 The Lost Girls (III).

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

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

A young man gets involved with a dangerous operation in an effort to rescue his girlfriend who's been brought to this country to work as an indentured servant...

Eric Delko returns as an expert witness for the defense, pitting himself against his old team.

When America's sweetheart, Phoebe Nichols, bursts into flames during a concert, the CSIs expose the dark side of pop stardom.

The bizarre case of a man chopped in half baffles the CSIs, while Natalia's injury puts her and Ryan in jeopardy.

When doubt is cast on his murder conviction, a man receives a 24 hour stay of execution very little time for Horatio and the team to reaffirm his guilt or establish his innocence.

The C.S.I. crew try to figure out exactly how and why a passenger on a private space shuttle trip died in space after his body is found having plummeted out of the sky...

Horatio heads to Los Angeles to hopefully clear Jesse's name, all while a former sports superstar is being investigated after a girl is found dead in his home...

The team investigates the axe murder of an office receptionist who was not well liked by her colleagues...

One of Kyle's army friends tries to protect his girlfriend from an "honor killing" and winds up as the number-one suspect in a murder...

Three hard partying, callous and seemingly unconnected young 20-somethings head to Spring Break for a wild time and end up in the morgue...

A victim's spirit won't leave Calleigh alone until she finds justice for his murder.

A seemingly perfect jewelry heist ends in murder and when crime scene evidence is stolen from the lab, and Delko returns to find the culprit.

When a suburban soccer mom is murdered, the CSIs uncover her family's dark past, while Delko continues his undercover mission.

When Horatio's ex-girlfriend is killed in an explosion, the team looks within their own department to find the killer.