As the first new medical examiner they have is shot, the CSIs learn the streets of Miami got more dangerous. Horatio must keep his team alive and restore order to his son's life. The clock runs out when one of their own is gunned down.
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. The PI also digs into the team's personal lives and gets both Calleigh and Eric pulled off the case.
A man is murdered when someone drops a piece of slate off a bridge. The team tracks the slate to one of their own and Alexx's son becomes a suspect. Then to make matters worse Alexx finds him in a warehouse holding a bloody knife over his friend who happened to be the other suspect.
After a body is found in a sinkhole, the team's investigation into the victim's death leads them to a robbery where the target is keeping a shocking secret.
A lawyer is run down by a car, then a man is shot down in a cafe. The only common link was that they were both caught on camera in a pedophile sting, and the team hunts for a vigilante.
In the second part of the two part episodes, Horatio deals with his past and the rest of the team works to rescue Calleigh from kidnappers.
In the first of a two part episode, Horatio once again has to tangle with his ex, Julia, who has it out for him. Someone is out for Calleigh, and is compromising their investigation in the process.
The murder of a bride at a wedding leads the CSI team to a strip club as the investigation progresses.
Kyle's mom shows up in Miami and she is the widowed wife of a billionaire. She wants Kyle back and will do anything to get him back.
The team uncovers the secret life of an unscrupulous FBI agent while investigating the murder of a young woman.
A rare and illegal machine gun that 'vaporizes' its victims is let loose on the streets of Miami.
Lifestyles of the rich and famous come under the CSI microscope when a wealthy family's nanny turns up dead.
A serial killer is on the loose with a craving, making Calleigh its next victim, which also jeopardizes her ability to do her job.
A family is in Miami vacationing from Canada when one of their sons is killed.
The investigation into a runway model's death leads Horatio to his son and his nemesis.
Strange events begin to happen as the CSI team tracks down a serial killer who killed during a solar eclipse.
The murder investigation of a sports legend has complications when his body is lost by the lab.
The team investigates the puzzling death of a student and find evidence that Tim Speedle may not be dead.
Horatio's son goes missing when a prison transport is attacked. Upon learning the identity of Kyle, he is targeted in order to get at Lt. Caine, who must find him before it is too late. Meanwhile, Ryan causes tension with his former colleagues when he is hired as an expert witness for the defense.
Stalkers turn an innocent teenage swimming star into a sex symbol plasting photos of her over the internet. When following her it is discovered Horatio may be in danger after his testimony in a grand jury.
When the team is investigating the murder of a probation officer and a hostage situation, Horatio learns that the main suspect could be his son.
