CSI: Miami

Horatio and Delko travel to Rio to find that Riaz, the man responsible for Marisol's murder, has been released from custody. While there, Horatio meets Yelina and learns that his brother may be connected to Riaz. Meanwhile Ray Jnr. accepts work from Riaz to mule drugs to Miami, unaware of the recent death of his father. Riaz is finally found in Rio, and dies in a knife-fight with Delko and Caine. Back in Miami, Natalia, now a CSI, helps Ryan investigate the beating death of a woman, and her inexperience leads to problems for Calleigh in the office. Caine, now also back in Miami, manages to track down and rescue his nephew.

A routine murder investigation at a hotel becomes more complex when an unknown vehicle crashes Calleigh's Hummer into a body of water, compromising most of the evidence collected at the scene. It is revealed that the victim was an undercover agent in the Crypt Kings biker gang, working alongside another operative named Jake Berkeley, Calleigh's former Academy classmate and boyfriend. Further investigations into the gang reveal the murder weapon as a CornerShot device, and the gang's involvement in gunrunning.

The team investigates a robbery and suspicious double murder at a "Bling-bling" party hosted by a famous jewelry designer in town. They soon find that one of the victims, a celebrity named Dakota Hudson, was listed on the "Death Pool 100". Investigations turn towards those poised to profit by her untimely death, ultimately leading to revelations of fake diamonds and offshore gambling and counterfeiting. Ryan is also caught out, by an embarrassed Calleigh, holding dead pool related "super-notes".

The team investigates the death of a famous male model after his body is found stuck under a boat. Later on they reveal a sick and twisted secret of the agency he worked for.

The body of a local politician is found in an empty house. The entire neighborhood was upset that he was backing the use of eminent domain, allowing the government to force them out of their homes. During the period of investigation, some members of the team have to deal with their enemies in the past while some have to come to terms with the nature of the profession they are pursuing.

When a believer in Santeria, a mix of Catholicism and African voodoo, is found murdered in front of her shrine of animal sacrifices, bizarre incidents start happening around the CSI lab and people speculate that the lab is cursed. However, the case takes an unexpected turn when the CSIs discover that the victim may have been murdered over a tangled plot involving stolen gold.

After an accident where the driver was decapitated during a dangerous stunt, the evidence leads the CSIs to believe it was more than an accident. While gathering the evidence, the CSIs find they must go into the world of "sideshows."

A murder and kidnapping becomes personal when DNA from a crime scene reveals that Natalia's sister Anya (Natalie Morales) is one of the kidnapped women they are looking for. The team finds a safe full of photos of missing women and they must find the photographer who was using his camera to lure the unsuspecting women. This episode was based on the photographer William Richard Bradford who photographed Eva LaRue's sister.

After a young woman is found dead shortly after she was auctioned off for charity, the team finds that the woman was trying to uncover the true nature of the event's host. As the team delves deeper into the investigation they soon discover a larger plot that could put Miami in danger.

A Marine recruiter is found dead on a civilian shooting range with various bullet holes in him, but there is no blood at the scene. The CSIs find out that the victim was dead before he was shot and that his body was pulled onto the range. As the case advances, Horatio determines the murder may be tied to the death of a marine in Iraq who was killed in combat. Natalia is shocked to learn that Nick asked Valera out and that she accepted.

When terror suspect Sonya Barak is targeted by her own people for assassination, she goes on the run, and Horatio sets out to capture her, both to protect her and bring her to justice. Calleigh and Ryan investigate when a dead body is found in the trunk of Sonya's escape vehicle.

Nick is murdered in his condo and Natalia is arrested for the crime when evidence at the scene suggests she killed him, but Horatio tries to clear her name. The evidence also reveals that Delko and Nick fought earlier in the day. In another case, a wealthy single man is found dead in his mansion with a granite-topped bookshelf on top of him. The investigation reveals the victim was seeing a therapist who suddenly dropped him as a patient. It is suddenly discovered, that the two cases are related.

After Frank steps on a land mine at a crime scene Horatio and the Bomb Technicians must deactivate the bomb. Delko gets hit with a large law suit after investigating a domestic dispute.

The lives of two CSIs are put in danger when an old enemy of Horatio's returns. When a truck full of confiscated weapons is hijacked and the weapons are released back into the public, Horatio links the crime to Clavo Cruz, a man he put away for murder years ago. However, on the day of Clavo's arraignment, a confiscated missile is launched into the courthouse to aid his escape, with Alexx inside. Meanwhile, Calleigh and Ryan investigates when an eleven-year-old boy is shot by one of the stolen weapons. The episode ends with the shocking revelation that Delko has been shot in the head.

In the aftermath of the ambush at the car park, Delko finds himself fighting for his life after being shot in the head. The investigation reveals Cruz may be involved with selling illegal African diamonds.

The parents of a babysitter are murdered on the property where she is taking care of a 12-year-old boy in an upscale neighborhood. The investigation reveals the boy's parents were drugged at a nearby party and that there is a thief in the neighborhood who may be connected to the crimes. Also, Horatio investigates a doctor's shady past that includes lots of dead patients. Loosely inspired by When a Stranger Calls and Harold Shipman murders

A hunter is attacked and killed by a black bear, but the evidence suggests the victim may have been set up as bait. The investigation reveals the death may be a cover-up for the murder of a high-priced hooker and her bodyguard who were part of an illegal prostitution ring servicing elite clients in Miami.

A wealthy real-estate developer is murdered at a plush mansion where a luncheon, organized by his wife, is being held to raise money for a children's hospital. Later, at a construction site owned by the victim, a woman's severed body is found. Also, Delko's colleagues worry that he may not be ready to return to work after he makes an error during the investigation.

Horatio suspects that a county supervisor and the Native American owners of a casino may be involved in a murder when a victim is found scalped near the gambling establishment.

Horatio investigates a movie star's murder inside a celebrity rehab center. The probe reveals that the actor's candid confessions while in therapy, including some damaging secrets, may have led directly to his death.

A contentious divorce turns deadly when the husband's mistress is murdered and other dead bodies follow.

A man is killed in a fire in his home, but his girlfriend escapes. Meanwhile, Horatio must fire Ryan when he doesn't disclose that he knew one of the suspects.

After the murder of a suspected carjacker the team discovers that he may have been involved with a formidable drug lord and was suspected of drug running off Miami's shores.

Horatio hunts for a serial killer who brands his victims with a "Y" mark. When an arrest is made, the alleged culprit is found to possess a supposed "killer gene" due to an extra Y chromosome. But just as the CSIs believe they've closed the case, the killings begin again.