There are 24 each in Seasons one to three. The fourth season had 25 episodes. The fifth season is currently airing in the United States. Since Executive Story Editor Corey Miller's BLOGdenotes seasonal episodes (ie. 101, 102, 201) which are listed along with cumulative count in "#" column as (1-01),(1-02),(2-01) etc.
The ex-Chief of Detectives for Las Vegas is found murdered and his 7-year-old daughter is found alive in Miami. Catherine and Warrick travel to Florida, where they assist the Miami CSIs in hunting down the killer.
Megan Donner returns to the CSI unit in time to work on a jet crash in the Everglades. While searching for survivors, they inexplicably discover a female victim found five miles from the crash site. When the only survivor says the woman opened the plane's hatch in order to commit suicide, Horatio is suspicious. The team must now recreate what happened on that fatal flight, especially when the pieces don't quite fit together.
A necklace bomb exploded killing a man and a good friend of Horatio's. With his friend gone, Horatio works double the strength into this case, which worries Megan, who also lost a friend in the line of duty. With three more bombs, they are put to the test to find out who is doing it and who are the targets. With evidence in hand, they search a Columbian port and discover things about the workers, that they think will help the case. But, after they find that out, the CSI team discovers the bomber is after the bomb squad.
Horatio and his crew investigate the discovery of a man's partial torso by a group of fisherman who slit open a shark they caught, only to have the man's remains spill out. Megan soon realizes the man was murdered when she discovers a bullet wound on the corpse. Later, a second victim is found floating in an inner tube.
A dead man with a slit throat and a partially burned face is discovered on a Miami beach, along with an unconscious young girl who was beaten and thrown into the ocean. The investigation leads Horatio to a prominent Florida family and its steely patriarch, who was once involved in a mysterious case that has plagued Horatio for years.
When a priest is found dead in his rectory after being brutally shot, Megan, Calleigh and Speedle must untangle a messy web of familial issues that lead to his death. Elsewhere, Horatio and Eric attempt to solve the emotional case of an exploded vehicle, which was home to a mother with child.
The whole team investigates the crime scene of an indoor amusement park when a young girl is found dead in the bathroom. They must track down the relentless man responsible for the heinous crime quicker than usual, as everyone on location has been detained until they can be cleared. What looks to be like a regular attempted kidnapping turns out to be much more than any of the detectives had bargained for.
The naked body of a male stripper who performed during a private party at a Coconut Grove estate is found the next morning in a nearby rose garden, and the CSIs have difficulty determining the cause of death. Meanwhile, Megan investigates the case of a male swimmer who suddenly dropped dead after climbing aboard a boat seven miles out in the Atlantic.
Horatio and his team must uncover the evidence in the brutal murder of an entire family in their own home. The only survivors are a blood-soaked toddler, and the father who's in surgery. The immediate assumption is that the mother is responsible - postpartum depression - but the evidence discloses a different outcome.
Horatio, Speedle and Calleigh root through the evidence in the homicide of a strange, and unorthodox college professor when they find him tied to a tree. Elsewhere, Delko and Megan investigate a car found in the water with a dead body in the trunk, and immediately suspect an insurance scam.
They investigate the death of a young model, whose body was found near a juvenile detention camp for girls. Across town, Delko and Speedle probe the bizarre death of a man who was apparently burned from the inside.
A married man and his co-worker looking for a little extracurricular fun have their ardor drowned when they find a dead woman - a prostitute - in their bungalow, which leads to a family man who's been hiding a shady past. The team handles a car jacking in which a German tourist was killed, but the circumstances look more like murder as the wife was left unharmed after the shooting.
A nude man is found tied to his bed, having suffocated while he was being sexually assaulted. Also a crematorium owner is murdered. When they investigate, they discover dozens of bodies that were never cremated.
A mugger is found dead on the street, his neck broken. But Horatio's team has a bigger problem on their hands: during the autopsy, Alexx realizes the man was exposed to radiation. Now the team must race against time to find the man's killer before the next victim, an environmental lawyer dies from radiation poisoning.
Before Horatio is set to testify at a murder case in which the defendant is the husband of a city councilwoman, he's given new facts that could prove the man is innocent but, there is new information which revolves around the discovery of a second victim who matches the killer's profile if the man on trial isn't guilty.
The investigation into a drug heist offers brief glimpses into the private lives of the CSIs, whose nerves are on edge when they become suspects in the crime they're trying to solve.
Horatio battles the FBI and U.S. Marshals in this well- crafted episode as he tries to uncover why a beautiful woman was murdered poolside at a ritzy hotel. His investigation begins shortly after the bikini-clad 27-year-old is found dead from two shots to the head. Evidence suggests it was a professional hit, which is strange enough. But the case becomes really puzzling when the Feds take an interest and U.S. Marshals show up. Plus, the murder weapon may be linked to a cold case once investigated by Horatio's sister-in-law (Sofia Milos). Elsewhere, Calleigh confronts her dad about his drinking problem after she's called away from work to drag him out of a bar. When Horatio goes to his sister-in-laws cubicle he sees a picture of his brother, sister-in-law and their boy, but the picture of Horatio's brother is not a picture of Dean Winters who later played his brother.
Horatio is approached by a parolee he helped put away several years ago, who begs for the lawman's assistance in finding his missing teenage son. As the investigation gets underway, Horatio discovers that the boy may be planning a deadly assault. Also: Speedle becomes attracted to a sexy model who may be involved in her boyfriend's death.
Horatio and his crew investigate the deaths of two college students who were in Miami on spring break. The first is a teen girl found dead on a beach with her neck broken and human bite marks on her legs. The second is a young man found on the bottom of a motel swimming pool who apparently died before he hit the water.
Speedle and Delko are present when a trendy nightclub catches fire, apparently from a deejay's pyrotechnics display, killing 16 people and injuring dozens of others. But the ensuing investigation reveals it may have been arson to cover up a murder. Also: Horatio probes the death of a prostitute who is found dead in a judge's bathroom in his home.
An explosion in a rundown barn nearly kills Horatio and his crew just after they find a dead man inside, bound with duct tape. The case gets personal for Horatio when it's discovered that the leading suspect knew his late brother. At the lab, Alexx is shocked to learn that her best friend's husband has been murdered, apparently the victim of a random shooting.
The trouble begins when an inmate is stabbed to death in the prison yard. Shortly after Horatio arrives on the scene, a helicopter appears above the correctional facility. He immediately fears that the murder was a decoy to set up an escape. That's confirmed as three prisoners hop aboard the chopper and flee. As the investigation gets underway, the identities of the fugitives become known and a horrible realization sweeps over Horatio: Two of the escapees are cold-blooded killers who already have their next victims picked out.
Horatio investigates the murder of a model intentionally run down outside of a Miami hotel by a driver who fled the scene. When the evidence leads to a suspect, governmental red tape puts an unexpected twist on the proceedings. Horatio and Yelina begin to confront their feelings for one another.
The body of a man involved in recovering sunken treasure is discovered pinned to the wall of his new cabin cruiser by a bloody spear fired from a speargun at close range.
When a teen tennis phenom is abducted from her bedroom, the investigation leads to the waterways when a girl's arm is recovered in the belly of an alligator. Delko calls for an expert - his old college buddy and now alligator expert Jeff Corwin to assist.
The two young owners of a city bar are gunned down after hours and another man is wounded in the attack, which was allegedly committed by a masked gunman. Meanwhile, Calleigh's dad announces he is now a public defender and needs her help with a murder case in which a woman allegedly stabbed her boyfriend to death in his car with a screwdriver.
A man and his wife are trying to drive out of a hurricane's fury when they strike and kill a man in the blinding storm. Horatio finds that the lack of impact wounds on the victim's knees suggest that he struck the car as opposed to the car striking him. In a seemingly unrelated case, Horatio finds another victim of the hurricane impaled on a fence. However, as the CSIs uncover the scattered remains of the post-storm evidence, it seems that these two cases may have a deadly connection. Meanwhile, after Calleigh witnesses a man looting a house, she realizes that she's got another case on her hands when she finds his ex-wife inside shot to death.
Horatio is driven to find his brother's killer and protect the niece he never knew existed when a woman shows up with Ray's illegitimate child. The team explores a voyeuristic Internet site in connection with a stockbroker's murder.
A young woman is attacked by a shark and later dies, but it's discovered that she was shot first. The case becomes even more difficult for the CSIs when one of their coworkers becomes a leading suspect. The dead woman worked for a private-investigation agency that specializes in luring and entrapping married men suspected of infidelity.
A young woman is thrown over the railing of a parking garage, but the investigation into her death uncovers evidence that she was killed before the fall and had likely been kidnapped. The victim's watch is traced to her boyfriend, who tells the detectives that she was a thrill seeker who was abducted during the course of an extreme kind of role-playing game. Meanwhile, Delko gets into trouble when he inadvertently interferes with a case after stumbling across a car-theft ring.
An anesthesiologist who worked in a beauty clinic is discovered swinging from a rope in his two-story condo, but the investigation points to murder, not suicide. The case intensifies when it's learned that the doctor lost a patient the week before during routine plastic surgery and that the victim's husband believes she was killed.
A diamond broker carrying two million dollars in merchandise is murdered after his car is hit by another vehicle and he gets out to confront the driver. The only witness to the crime is a developmentally challenged man who says the killer is someone named Colton. Meanwhile, outside of town, Speedle and Delko investigate the death of a teenage girl discovered at a rest stop with a broken neck. Shortly after the victim is taken from the scene, her body disappears during transport to Miami.
A cigar maker is found in his store tied up, beaten, mutilated, and murdered with a chaveta, a cigar-making tool featuring a rounded blade. The investigation leads Horatio to a group that helps Cuban refugees. Across town, a 25-year-old man is gunned down while withdrawing money from an ATM, but the motive doesn't appear to be robbery since the cash he withdrew is left behind.
Delko and Alexx are nearly burned alive when they investigate the death of a hunter found shot near a supposedly controlled burn in the Everglades. The fire suddenly rages out of control and traps them, forcing them to take refuge under a tarpaulin. Later, a second body is discovered, and this time it's a young woman who looks to have been beaten to death. After bite marks are found on the victim's breasts, Horatio is led to believe a sex offender is behind the attack – and the fire.
A celebrity photographer is found dead in his car following an accident, but Horatio believes he was murdered. The investigation leads to an A-list movie star who was caught in a compromising position in photos taken by the paparazzo.
When a former surf champion is murdered in his home, the CSIs are determined to find the killer. Ted Henderson is killed in his own home and his body is missing, while his wife and son are left beaten and bound. While searching the home, Horatio finds heroin in the son's room and learns that he is secretly a drug dealer. Meanwhile, the CSIs find a home pregnancy kit in the bathroom that reveals Ted's wife is pregnant, but Alexx finds proof that the baby could not possibly be Ted's. Now, Horatio and the team find evidence that suggests that someone at Ted's surfboard manufacturing plant was not only the son's supplier, but may have a strong motive for the murder as well.
Horatio is quick on the scene when an armored truck carrying $3.2 million is robbed in a daring downtown heist. During the holdup, the driver is killed and Horatio guns down one of the two thieves. The other escapes with the loot, but the money turns out to be counterfeit. The team must figure out what happened to the bank's money before it was replaced with fake bills. Making the day even worse for Horatio, Yelina spies him with his niece and assumes the girl is his illegitimate child, not her own late husband's daughter.
Horatio and Speedle's case hinges on the testimony of a forensic-evidence enthusiast who stole a blood-drenched latex glove from the scene of the murder of a man who was stabbed to death with a butterfly knife. When Speedle tracks him down, the CSI wannabe is impressed by the ease with which Speedle was able to locate him, and the two begin to develop a slight bond when he shows up at the crime lab the night before he is set to testify. However, their relationship is cut short when the young man is found dead in his forensics-shrine of a home. Meanwhile, Delko and Calleigh probe the shooting death of a young woman whose body is found wrapped in a plastic garbage bag in a dumpster near the ritzy Miami club where she worked.
Josh Dalton, a hot, young reporter for the Miami Sun, witnesses the murder of his friend, a city councilman's aide, in Miami's drug district, the Golden Triangle. Josh, who was suspiciously unharmed in the attack, claims that they were only down there on a story, but Horatio believes that there's more to the situation. Later, another writer from the same paper is found shot to death inside the trunk of her car, which was reported stolen. Now, as the evidence rejects Josh's version of what happened, the CSIs find themselves entangled in the world of fast-paced journalism and learn that there is a dangerously fine line between the truth and what sells newspapers.
A police officer collapses and dies after pulling over a car, and the investigation reveals he was murdered. Horatio grows suspicious when Internal Affairs gets involved in the case, leading him to believe that the killing wasn't a random crime. Meanwhile, Calleigh aids an abused woman who is living with one of the suspects in the probe. Yelina begins dating Horatio's nemesis – who is heading up the Internal Affairs inquiry.
After a small plane crashes at a Miami beach and the pilot dies, Horatio finds remnants at the crash site of chemical used in making cocaine, and it seems that the victim's business partner may have sabotaged the aircraft. However, when evidence suggests that the pilot may have died before the crash, the team investigates the victim's neighbors – all wealthy residents of a secluded cul-de-sac where lust, jealousy and greed are dangerous motives for murder.
A security guard is found dead after shots ring out at a rap star's concert and the CSIs must investigate. Rap star 10-Large won't talk to the police regarding the murder or why someone would try to kill him. But when evidence suggests that perhaps 10-Large's bodyguard was the intended target, the CSIs must look into the dangerous world of personal security. Meanwhile, Alexx gets the shock of her life when a supposed cadaver from a recent car accident wakes up in her morgue, suffering only from hypothermia.
When a teenage girl returns home from a big party night at an underage nightclub to find her parents murdered, the search for the killer leads Horatio to New York City. Before he arrives, the New York detectives, led by Detective Mac Taylor, are called out to investigate the shooting of an undercover police officer – who, it turns out, is the lead suspect in the Miami case. However, the medical examiner determines that he has been dead for 72 hours and could not even have been alive at the time of the double-murder in Miami. After further investigation, Horatio and Mac determine that the real killer murdered the New York cop, then used his ID to get to Miami, and is still on the loose.
An adult film actress is found strangled in the park and the CSIs must find the killer. Blood and human tissue are found under Ashley Anders' nails and the DNA matches that of the CEO of the company that distributes her films – and he's a registered sex offender. Also, Calleigh discovers his answering machine audiotape on which he makes a threat against Ashley. However, there is an accident back at the lab with this crucial piece of evidence and Delko was the last person to handle it. Now, IAB's Rick Stetler is put on the case, much to Horatio's dismay, as the CSIs try to uncover further evidence in order to find the girl's killer.
After a large yacht slams into a major Miami bridge, the team finds that the man steering the boat was shot and killed before the accident. The victim's wife reveals that their son had been kidnapped and her husband was handing over the ransom – three million dollars worth of jewels. But when the team learns that the jewels were fake, the investigation leads them into a dangerous situation at a jewelry shop that may contain crucial evidence, where Horatio must face the unimaginable when one of the team is killed in the line of duty.
A woman is killed during a party at a Star Island estate when a man opens fire on the proceedings from a cigarette boat. When a former con is arrested, he acts as his own lawyer and proves to be smarter than he appears. Complicating matters is the fact that the leading witness in the case is the dead woman's young son, who Horatio wants to protect, refusing to let him testify.
The CSIs must find the killer after a young woman is pushed in front of a moving bus. Alexx finds a bruise shaped like a hand imprint on the victim's back, proving that she was pushed in front of the bus, and her boyfriend, Jay Seaver, is the prime suspect. When one of Jay's office rivals also turns up dead, Jay reveals that he has a psychotic stalker, Claudia, who he thinks might kill to please him. However, when Jay hires a lawyer to protect Claudia, Horatio suspects that Jay may be more involved than they thought. Later, a man's body is discovered down an elevator shaft in a nearby building, and there is evidence to link the victims to a common killer. Meanwhile, Calleigh's father seeks her help when he fears that he may have killed someone after a night of drinking, and Horatio assigns a new CSI, Ryan Wolfe, to the case.
E-mails and text messages trigger a mass gathering of students to perform a random task on a golf course. However, as the crowd disperses, the body of a high school student is found. The original message triggering the "flash mob" is traced to a high school senior whose father is a high-powered defense attorney. The case changes direction when Horatio and the team learn that the schoolmaster's daughter may have had something to do with the murder and evidence reveals that the victim was having an affair with his chemistry teacher.
An 18-year-old girl is stabbed to death in a bathroom of a popular Miami nightclub. Horatio learns that the victim was an investigative aide working for Alcohol Beverage Control and was monitoring underage drinking. As Horatio interviews the club's owner, an unknown man drives by the club, sees that the police are there, and crashes his car while fleeing the scene. However, the case gets more complicated when they discover another murdered victim inside the car. DNA from the second victim's watch ultimately leads them to a day spa where the services may not be entirely legal. Meanwhile, Calleigh and Ryan work together to determine whether an insecure and underage teenager at the club that night had anything to do with the murder.
The wife of a famous baseball player is brutally killed in her home and her philandering husband is charged with the crime. The jury on the case, as well as the accused and his defense, visits the house to examine the crime scene, but when the lights are dimmed, as they were when the victim was killed, and then turned back on, the ball player is found dead with a meat clever in his back and a note that reads "guilty." Now, as Horatio and the team find that the husband's defense team tampered with the crime scene, they must examine the evidence to find the couple's killers. Meanwhile, Horatio gets a call from Yelina, who tells him that her son, Ray, Jr., is missing.
As a huge tsunami heads directly towards Miami, a ten-hour warning gives citizens just enough time to evacuate the city. In the chaos, two people are killed in a parking lot and the evidence leads Horatio to discover a plot to rob a bank timed to take advantage of the evacuation. However, as the CSIs close in on the robbery already in progress, they find that it's a more elaborate crime than they previously thought. In the wake of the storm, Ryan and Alexx discover a body washed up from a local cemetery that may have a different cause of death than originally recorded. Meanwhile, Horatio suspects that Yelina is being physically abused by her boyfriend, IAB's Rick Stetler. When rebroadcast by CBS on April 172006, the episode was reedited with the cemetery subplot removed.
A murder investigation takes Horatio and the team into the world of speed dating. Richard Laken is found killed by a tire iron outside a lounge following an evening of speed-dating. The team discovers his car is covered with acetone, which traces back to one of the female guests. She reveals that she dated Laken and he dumped her, so she doused his car with nail polish remover for revenge, but she didn't kill him. Now, when Horatio and the team learn that Laken recently witnessed a serious assault at a Miami Heat basketball game, they are on the hunt for two perps instead of one.
The team investigates a modern-day piracy off the coast of Miami after six bodies are discovered floating in the ocean tied together by rope. Horatio suspects that a ship was hijacked with some of the crew killed and then dumped overboard. Evidence suggests that other crew members might have escaped on a life raft. Using radar and GPS technology, the CSIs find survivors but their stories don't match. Now, Horatio and the team must learn what really happened out in the ocean as they find themselves investigating the seamy underbelly of Miami's militias and arms dealers.
The CSIs must investigate when a pedestrian is killed after a man falls from a building and lands on him. Horatio and the team find that the victim found on the sidewalk is not the same man who fell from the building, but the unfortunate person he landed on. The CSIs discover that the fallen victim is in possession of a sex DVD involving a top Miami criminal judge and a woman with a sordid sex life. When the woman is found dead, the team must delve into the complicated personal lives of those in Miami's judicial system in order to find the killer.
When a woman is killed in what looks like a carjacking, the CSIs talk to her husband, the oldest of the three brothers who run their lucrative family business. However, when it is revealed that the victim had a gambling addiction that could have bankrupted the company, the team must follow the evidence to find the killer. Meanwhile, Alexx hires a recovering alcoholic as a body hauler and must investigate when he is accused of stealing from the dead.
When gang-related gunplay goes down in an emergency room, Horatio and the team must find the gang members responsible. The evidence suggests that an orderly in the hospital recognized the wounded gang member, who possibly killed one of the orderly's friends and alerted gang members to his location. However, the evidence doesn't match up and the CSIs discover that a cheating girlfriend, not gang retaliation, may be behind the shooting. Meanwhile, Ryan questions a mother in the emergency room after her story regarding her child doesn't add up.
During a routine traffic stop, a police officer is murdered and now Horatio and the team must track down the killer. The only witness to the murder is a civilian who was doing a ride-along with the officer, but who is now missing. Roadside evidence leads the CSIs to Missy Marshall, a teenage girl who was with the killer at the time of the murder. However, as the team searches for the civilian and the killer, they find that Missy may have been more involved with the killer and the shooting than she is admitting. Meanwhile, Horatio and Rebecca's relationship is in jeopardy when they don't see eye to eye on a case.
