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A hostage situation turns into murder, leading Horatio to believe one of the suspects may be his son.

After the Internet turns a high school girl into an international sex symbol, information leaked about Horatio puts his life in danger.

Horatio searches for his son after he goes missing during a deadly prison break.

While investigating the mysterious death of a college student in a car fire, the CSIs find evidence that Tim Speedle may still be alive.

When a sports legend is murdered, the investigation hits a snag when the lab loses the body.

Bizarre occurrences begin to plague the CSIs as they hunt down a serial killer who struck during a total eclipse of the sun.

When a model is electrocuted on the runway, the case leads Horatio back to his son and his nemesis.

When a family vacation turns deadly, the CSIs must find the killer before the survivors take justice into their own hands.

An attempt on Calleigh's life puts both her professional and personal life in jeopardy.

Lifestyles of the rich and famous come under the CSI microscope when a wealthy family's nanny turns up dead,

When a rare and illegal machine gun "vaporizes" three weapons' smugglers, the CSIs must find the killer before the gun causes more deaths.

While investigating the murder of a young woman, the CSIs uncover a meth lab in her apartment and an unscrupulous FBI agent with a secret life of his own.

Horatio's ex and Kyle's mother (guest star Elizabeth Berkley), resurfaces as a billionaire's widow who will do anything to get her son back.

A wedding murder takes the team to a strip club.

In part one of the two-part episode, Horatio's past comes back to haunt him when Julia (guest star Elizabeth Berkley) has him arrested for murder.

In part two of the two-part episode, as Horatio deals with his past, the team races against time to save Calleigh from kidnappers.

The team must act quickly to stop a vigilante who is killing Internet predators.

A body in a sinkhole leads the team to a robbery whose target holds a shocking secret.

When Alexx's son becomes a suspect in a murder, saving him has dire consequences.

When a man is killed due to a fake 911 call, Horatio must face off with a private investigator who is systematically destroying the team.

When someone is determined to take down the team, Horatio puts his life on the line.