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.

A woman falls from the sidewalk and is hit by a speeding bus. She dies instantly. A hand-shaped bruise on her back convinces both Alexx and Horatio she was murdered. Horatio wants someone with no biases to work on the case and assigns the rookie Ryan to the case. Horatio just hired him because he is impressed by how clean Ryan's guns are. Calleigh's father thinks he may have killed someone while driving drunk.

A group of teenagers gather at a golf course at a specified time. After the flash mob disperses, a body is found near the site. The CSIs follow the mob to a very prestigious prep school. They manage to trace the origin of the text messages telling the receivers to meet at the golf course to the son of one of Florida's most famous defense attorneys. At the same time, Horatio and Yelina are working to find the killer of a woman found in a dumpster.

A young girl is stabbed to death in a trendy night club. Jenny was an undercover investigative aide working for the Alcoholic Beverage Control. Her target was the club owner. As Horatio is questioning him, a loud noise draws him outside where a car speeds up and crashes into the door. The body at the back of the car leads the detectives to a spa where they suspect that there is something illegal going on.

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.

After speed-dating 15 women, each 5 minutes, in a South Beach club, Richard Laken is found murdered in his vandalized car. The stylist date who poured the acetone -accessible in her trade- over it admits so, but did so well before the murder, so her story that Laken left early is believed. Indeed, the club's dates record shows Richard left after talking to Rebecca Briggs, who claims he was systematically using their information to commit robberies, but that proves to be the club manager's scam. However at least someone else in the club had a murder motive...

After a just married couple finds 5 dead men while diving it looks like a ship has been pirated and Horatio and his team have yet another murder case.

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 husband and wife are carjacked and she later ends up dead and her husband is wounded. The husband is the oldest brother of a family that owns a very good business.

A presumed retaliation shooting in an ER turns out to be a bit more complicated, and Ryan begins to suspect a mother of abusing her baby.

During a routine traffic stop, a cop gets killed and the civilian who drove along with the cop is missing. Horatio and his team find out a 16-year old girl has got something to do with it.

The team investigates the murder of a bellman at a hotel. A man asks Calleigh to look for his wife who is missing.

When a snake is tied to drug smuggling, DNA may be the key to Clavo Cruz's father's cooperation around diplomatic immunity. Ryan and Calleigh get caught up in an identity-theft case and linked murder.

A fire in the glades complicates the search for the perpetrators of three murders, and puts a team member in the sights of an escaped killer.

When a cargo plane crashes, Horatio must determine the cause and how a corpse ended up in the hold.

The team investigates the murder of a tester who works for a skateboard empire, and Horatio moves fast to find a stolen sex video before it's marketed.

The death of two IRS agents sends the team on the hunt of three killers, meanwhile Wolfe keeps stepping on people's toes.

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 shooting at the courthouse gets more and more complicated as new suspects are identified.

The man who killed Horatio's brother is found dead, which puts Caine on a trail the Feds don't want him on, and the team works to solve the murder of a popular classmate at a fifteen year reunion.

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.

An explosion at a "Break-In Party" leads to the discovery of a bomb, and a search ensues for the person who ordered it, before it's too late. Meanwhile, Caine and Calleigh each have personal matters to deal with.