The investigation of the murders of 2 young models hit a sudden stop when the two perpetrators have diplomatic immunity from the US government.

A police officer literally drops down dead besides a car he pulled over.

A porn star is strangled to death. Evidence points to the owner of her studio as a primary suspect.

A boat crashes into a bridge. On it is a dead body of a man. He was killed while delivering ransom money to his son's kidnapper.

Horatio's attempt to protect the young witness of a drive-by boat shooting at a party may put Yelina's life at risk when the suspect finds out about the boy.

The jury of a brutal murder of a woman visits the crime scene and a juror falls down with a seizure. After the initial chaos, the defendant, the victim's husband, is found dead with a knife stuck in the back of his head.

An impending tsunami is the backdrop for a heist gone wrong and bodies keep stacking up as Horatio and his team struggle to pin down the man behind everything.

A man is seen falling from an apartment building, yet the corpse found there is not his but Michael Johnson, a resident, who was deeply wounded by an unidentified round object. First subject is junkie Doug Ramsey, who is arrested by Horatio for probably abseiling to break in and steal the $100,000 heirloom ring of the condo owner, Edward Mathis, who is however found taking it back after its sale, insurance fraud. The wounding object is found, a CD recording kinky sex scenes of missing Donna Scott and reputedly strict criminal judge Isaac Greenhill, whose former court clerk is Mathis, who apparently blackmails him. Ramsay claims police abuse, IAB Sergeant Rick Stetler investigates Horatio, but Ramsay's X-rays... Speculating on a link with the judge's major cases, the team finds Donna's corps in a strangler's peat swamp dumping ground, with vomit which allows a DNA trace to Mathis, but Horatio now considers him a mere pawn...

A woman is murdered at a bar that serves more than just drinks. After a night out, Delko's badge is missing. Horatio finds out that his brother killer is really a DEA agent under deep cover and his brother is still alive.

A stay of execution sends the lab scrambling to reexamine evidence in order to keep the killer on death row, but he has his own plans.

Horatio and the team, reunited, encounter the Mala Noche gang while investigating a shooting that killed an officer and the rape of a maid.

The search is on for a young woman who disappeared from a club, and an old case of Horatio's resurfaces.

A killer who has it out for Horatio surfaces in Miami, and frames him for a murder.

Ryan Wolfe, with a nail knocked next to his eye, is being carried to hospital by Delko. There, Horatio remembers how the day started, with the discovery of a murdered woman who was attacked by someone with a nails gun.

When a drug dealer is gunned down in his home, Horatio and the team must determine who, out of three suspects, committed the crime. Meanwhile, Delko faces a serious threat to his career, and Calleigh makes a decision about hers.

A robbery at a spa injures Marisol, and a hunt starts for the three thieves before more are hurt.

A biker who falls off a balcony was an undercover A.T.F. agent. The gang he infiltrated may be running "corner-shot" guns designed for urban warfare, and another agent who also infiltrated the group may hold the key to the case.

A grizzly bear attack in the everglades puts suspicion on the hunting party, but things get more complicated once their hotel room is found.

While investigating a possible arson case, Horatio discovers that Yelina is back in Miami working as a private investigator. Meanwhile, Wolfe's prior relationship with one of the suspects gets him in hot water with his superiors.

CSI goes after a serial killer whose signature is related his extra "Y" chromosome, once believed to be the "killer gene."

An Internet celebrity's boyfriend is killed with a bow and arrow. During the case, Horatio becomes a "cyberlebrity" himself, which puts his life in danger.

A former star pro quarterback is killed. But the investigation determines that the person who initially tried to kill him did not deliver the fatal blow.

A model is electrocuted on a runway, and CSI discovers that the case is connected to a heroin smuggling ring involving a designer and the prisoner who held Horatio's son hostage.

Calleigh could find herself in trouble after she is involved in an off-duty shooting. Meanwhile, the shooting leads detectives to a separate murder, which is connected to drug dealers.

The body of the witness Julia Winston paid off in Horatio's son's trial is found in a swamp, but Horatio's investigation is interrupted by his extradition to Brazil to face murder charges. Meanwhile, Calleigh is kidnapped.

Calleigh's kidnappers use her to try and cover up a shooting death that they committed. However, she discovers that the gunshot is not what killed the victim. Meanwhile, CSI uncovers more clues in the death of the trial witness.

A notorious private investigator becomes a central figure in an investigation into a phony 911 call that ends in death, and he uses information he's gathered about Calleigh and Eric to get them thrown off the case.

A plastic surgeon is killed by a wood chipper. During the investigation, Horatio discovers that his old nemesis Ron Saris is still alive and was one of the dead plastic surgeon's patients.

Ron Saris has a connection to a series of deaths where the bodies were dissolved in sodium hydroxide, Wolfe exposes Dr. Price's prescription drug addiction, and Julia Winston is driven over the edge.

A man desperate for justice creates a hostage situation at the Miami/Dade Police Department, and Horatio looks into his claims. One of the hostages is Jesse Cardoza, a former CSI who is returning to his old job.

A "cougar" is romantically connected to three victims who were electrocuted during a beach volleyball tournament, and the internal investigation into Calleigh and Delko comes to a conclusion.

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

While investigating a murder that takes place during a diamond heist, the team discovers that the culprits weren't after the diamonds. Meanwhile, a package of diamonds is stolen from the evidence box at the crime lab.

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

The state's attorney Delko has been working with is killed by a car bomb. The car was stolen from Evidence just like the diamonds from the earlier case, and the evidence soon leads back to Wolfe.