The detectives work on two cases. One involves multiple homicides at a restaurant. The second case opens with an amputated leg found in a dumpster and ultimately leads to the owner of the missing limb, found dead in his own bed.
A suspicious brief case is found at a mercantile marker and a bomb squad is immediately summoned to the scene where Dectective Taylor is using a robot to lift a fingerprint off of it. Meanwhile, an apparent suicide takes place at a church.
A police officer is shot in the middle of Central Park from a building way outside the park. He dies right away. Sadly, the bullet, an important piece of evidence, is buried into the officer's horse, Blue. Removing might end Blue's life.
Mac and Stella investigate the murder of a woman who was stabbed in the heart with a wooden stake. The police arrest a woman who was kneeling over the body with blood on her, but Mac isn't convinced that she committed the crime.
A young John Doe, nicknamed 'Slick', is found lying across the rails of an underground subway. At first, he appears to have died from third-rail electrocution, but an autopsy suggests that he may have met his end by other means of electrocution. Meanwhile, Leo Whitefield is found shot dead at close range in a gallery he owns, with no sign of break in or theft, and a construction worker turns up with a fatal injury to the head.
The detectives investigate a murder at a grocery store that is also connected to the death of a young man with the tattoo "Tanglewood" on his back. A third case involves a woman who was killed in a hit-and-run auto accident.
A very small box is found on the beach with the body of a man curled nicely in it. What is amazing is that this box is only 2x2x2 feet. This leads the detectives to a circus where the man was working as a contortionist.
A body is found, wrapped in a hotel sheet, at a laundry facility prompting Taylor and Bonesara to go through a list of NY hotels to find the owner of the sheet. Messer and Burn investigates the death of a 'living statue' found in a local park against Taylor's order.
A beautiful young sports agent is struck accidentally by truck as she flees from an unknown abuser. Meanwhile, a Boston baseball fan turns up dead from internal injuries and a new confession leads Mac to reopen the case of a death row inmate helped convict.
A very skilled and famous skyscraper climber falls off the Empire State Building while attempting to scale it. Mac Taylor and Sheldon Hawks (on his first field assignment) investigate the case. In another part of the city, Stella Bonasera and Danny Messer must solve the mysterious death of a famous designer found dead, wearing his latest creation which is a bra made of diamonds. Aiden Burn works solo on a rape case.
A plastic surgeon is found dead at Grand Central Station during rush hour. He apparently died from inhaling lye. Stella and Danny investigate the death of a blind woman. Aiden is more intent than ever to solve the rape case that she does the unthinkable, an action which forces Mac to fire her.
Three cases. A murder during the Feast of San Gennaro with ties to a financial services company. A body sitting upright on a Central Park bench. An apartment fire where a 10-year-old boy dead of smoke inhalation.
A young girl lands on the windshield of the car. Her feet tells Stella that she was a dancer. Lindsay Monroe works solo on the death of an old tram driver. She soon realizes that her case is related to the first. The third case involves the death of a fish merchant. He died from a fatal wound caused by a swordfish.
A young woman gets on an elevator with an older man. When the door opens on his penthouse, he is shot by an unseen person. The girl is not hurt and the team must track her down as she is the only eye-witness of the murder. Stella and Sheldon Hawks fish a body out of a pond in Central Park. The man, however, did not die from drowning. He suffered a fatal allergic reaction.
Four men are playing poker in an apartment. When they catch a man cheating, the other men throw him out. Just a few moments later, the doorbell rings; when one of the players looks through the peephole, expecting to see the recently departed cheater, he is facing the barrel of a shotgun and is instantly killed. Meanwhile, in Central Park, a TV weather girl is found dead on the ground. Autopsy reveals that she drowned, even though there is no water near the crime scene.
A teenage boy stumbles upon a dead body in a shop full of dolls. The man was the owner of the doll hospital. The room shows signs of a great struggle with dolls scattered all over the floor. In an upscale apartment, Stella and Sheldon Hawks examine the body of a waitress who had cancer. As oppose to the other crime scene, this room is in perfect order except for a spilled can of soup.
A female roller derby dies during a game. At first glance, it seems that she was trampled to death. However, autopsy reveals that she died from heating up from the inside. The other case involves the death of a writer found in a dumpster and wrapped in an expensive rug.
Danny and Stella are investigating a murder of a billionaire in a crime scene what seems to be a bedroom but while Stella is interrogating suspects, Danny searches the room for possible evidences and Danny manage to push a button that turns the bedroom into a panic room. With Danny trapped inside the room, they have to find a way out for Danny while a murderer is at large.
A famous model drops dead on the catwalk. Though she is thin, the young model is very healthy. Mac, Danny, and Sheldon Hawks work together to solve the mystery. At the PD, a man gives himself up and confesses that he has just killed his doctor. However, Stella does not think he is the murderer as he cannot give her specific details of the crime.
On a trip home from work on the subway, Danny sees a body laying on the tracks. Luckily, he manages to stop the train before destroying any evidence. Mac Taylor, arriving from a Mayor's reception in his tuxedo, and Lindsay Monroe join him. Stella and Hawks investigate the death of stock broker found hanging from a noose off of the window of his fancy office. As usual, the hanging was staged as the man was strangled to death.
Danny and Lindsey investigate the death of a music promoter and enter the world of ad posting wars between up-and-coming bands. A billionaire playboy is found impaled on a billboard with a model after throwing a party for an artist.
A man is found dead in a cemetery. The wound on his chest indicates that he died from a bullet wound, yet the CSIs found nothing but small pieces of paper inside it. The second case is of a dead woman found blindfolded with her hands tied behind her back in her fancy bed. The investigation leads the detectives to a restaurant that serves exotic food such as centipedes, live octopus, and cockroaches.
A doorwoman is found dead in the water tank of her apartment. All the evidence which are readily available points to a doctor who lives in the building. However, the man swears that he had nothing to do with the dead woman. The other case is of a man found dead on a playground in Washington Heights.
The body of a woman, half eaten by beetles, is found in a museum exhibit. The only eye-witness is a young boy who refuses to talk. Danny works solo on the case of a dead urban golfer found dead on a construction site.
A man dressed as a superhero, complete with tights and a cape, is found dead. The investigator finds that he is a patient living a home for the mentally ill. As they dig deeper, they find that someone working there is illegally selling prescription drugs. The second case is off an up-and-coming football player found dead inside his hotel room. The very healthy athlete died from a small puncture wound.
A limousine driver is shot dead inside his car, while a concert by Kid Rock is happening inside. Lindsay and Danny works on the case. Mac hears of a shooting on the police radio at Stella's address. He rushes to the scene where Stella is on the ground unconscious, while her boyfriend, Frankie, is found dead. Gunshot residue confirms that she shot him.
The CSIs arrive to investigate the death of a man shot in front of his house. A woman runs towards the scene crying that the deceased was her husband. Moments later, another woman also claims that she is the dead man's wife. It turns out that the three people were a committed threesome. The other case starts with the discovery of a woman dressed as a mermaid found inside the river.
The US Marines are staging a small show in Central Park. During one of their games, a young boy finds the body of a noncommissioned officer. The Marine was highly decorated having served in many campaigns. The absence of any defensive wounds is puzzling to Mac Taylor as the victim was a very strong, well trained and combat hardened Marine. The second case involves a burnt body inside a car. Facial reconstruction reveals a shocking answer. The victim a familiar face.
A man with an engagement ring turns up dead on the Brooklyn Bridge--but more than one woman could be the prospective fiancée. And a socialite dies in a penthouse with serious bruises and another man's blood on her body, and LSD in her system.
During a Blue Train rave, a young girls dies among party goers when she starts bleeding from her eyes, nose, and mouth. The CSI's believe her to be a victim of a biological attack. The investigation is further complicated when it is revealed that Hawkes once knew the girl. Further up town, a rich playboy is found drowned in his indoor lap pool with his former maid as a suspect.
The murder of a young woman in a hospital goes undetected by the hospital staff. The victim was the driver in a drunk driving accident which killed her best friend, and she had just come out of a coma.
A teenage girl is killed, and the only potential witness is her deaf mother. The case also brings back some haunting memories for Lindsey. Meanwhile, CSI also investigates the murder of a star figure skater.
A competitor is murdered during an "idiot run" shopping cart race in Central Park, and CSI suspects that a man found dead in a brownstone may have been murdered by a missing woman that he may have been holding hostage.
The death of a drag queen appears to be related to an old rape case involving a congressman, and two of the suspects in a second murder case are discovered to have used a professional alibi-providing company to conceal their affair.
A personal shoplifter supposedly turns murderer when a loss-prevention officer gets to close to her operation. Mac and Hawkes take a closer look at the death of a college student who was recently inducted into a secret fraternity.
A famous magician plans three death-defying stunts on three consecutive nights. But on the first two nights, two of his assistants die in ways that eerily resemble his stunts. Can CSI solve the mystery before there's a third victim?
At a French Revolution themed fund raiser at the UN, specifically at the French consulate, Mac, Stella and Hawkes find themselves hurdling diplomatic road blocks investigating two murders leading to an unexpected suspect. Meanwhile, Danny and Lindsay reunite on a "blinged" out cockroach that lead to murder of a prominent chef.
A body of a woman, Emma, in a black party dress is found in a dumpster. Her head is wrapped in packing tape. When the ME examines the body, he finds that her eye lids have been removed. This leads Mac to a recently released serial killer with the same MO. The second case possibly involves the Russian mafia. Lindsay and Danny team up to unravel the truth.
Detective Scotty Valens from Philadelphia's Cold Case unit comes to NY to investigate a murder that connects to Stella's past. Also Mac's recent solo bust is scrutinized because a handcuffed criminal fell of a rooftop.
The investigation to Mac's botched bust continues. Meanwhile, a guy who crashed his bride-to-be's bachelor party, is found dead in the restroom, and the eye witness testimonies point to tennis star John McEnroe.
An Irish gang sets an elaborate plot to reclaim a drug shipment being held at CSI after a bust, but Mac, Stella and Hawkes are forced to take them on. Meanwhile, Danny is being held as a hostage at another location by the same gang.
While Danny and Lindsay investigate a possible murder-suicide at a supposedly haunted house in Amityville, Mac and Stella tackle the case of a man who appears to have been killed after he already died.
A notorious hotel owner known for her meanness is found dead under an ice sculpture, and the clues to the death of a second woman who fell to her death onto a school bus can be found in the book "Peter Pan."
Investigators believe that a corpse they found is that of a serial killer from their past. However, they soon discover that the body was made to look like the killer, and that the killer is after a new target.
A high school guidance counselor is killed during a dance. The case may be connected to the sexual assault of one of the students by another classmate, and a deputy inspector's daughter holds the key to solving the crime.
CSI investigates the poisoning death of a fan at a basketball game, moments after making a million-dollar half-court shot. Meanwhile, the taxicab killer strikes again, and the team finds more clues about the killer's identity.
Mac barely escapes death after his kidnapping and quickly goes to work trying to track down the location and identity of the bank robber. During the investigation, CSI discovers that Flack's sister may have a connection.
CSI connects two radiation poisoning deaths to a dead librarian and the rare books collection at the New York Public Library. However, the life of the medical examiner is in the balance after he comes in contact with one of the bodies.
A powerful business consultant is killed during an unrelated street party, and the motive appears to be related to her missing flash drive, which contains incriminating information against some of New York's most influential people.
A man is found dead in a basement, but the house where the death occurred is found miles away on a barge in the East River. Meanwhile, Flack discovers that his sister lost her job and has a drinking problem.
Night find the big city as two NYPD officers come upon a young man attempting to put a young woman's body in the trunk of a car. When the police go after him, the young man is impaled on a fence, leaving many unanswered questions. Stella and Det. Angel investigate the death of a pawn shop owner that reveals an old foe is back.
An environmental terrorist group bombs the home of an electronics recycler, and his daughter is killed--but the daughter is part of the terrorist group. Meanwhile, Danny considers proposing to Lindsay again.
A man is killed when he falls out a window in media mogul Robert Dunbrook's building, but did Dunbrook throw him? During the investigation, Mac discovers that the case is connected to an earlier case involving a missing flash drive.
Following a spray of machine gunfire, the CSI team rises from the chaos. But when one member's life is significantly changed, it proves to be the emotional motivation they need to piece together their lives and ultimately find the shooter.
While investigating the DNA from a murder scene, Hawkes discovers that the DNA is connected to more than a dozen cases over a three-state area. But does the city really have a serial killer on their hands, or is there another explanation?
When a software company executive bleeds to death on a Manhattan street, the CSIs must delve into the wet and messy world of food "sploshing" parties - where groups of people experience food in an sensual way - to find his killer.
After a body falls from the 59th Street Bridge, the CSI team finds a compass near the body pointing east, and realizes it's the third victim of the Compass Killer. Meanwhile, detective Flack, still dealing with Angell's death, goes AWOL.
Mummified remains are found in a booby-trapped Manhattan penthouse that has been closed off for more than 80 years, and Mac and Stella race against time to find the people who discovered the body, who are still trapped in the building.
When a beautiful star quarterback of the Lingerie Football League is found murdered in the locker room hot tub with traces of lidocaine in her system, the CSIs are called in to find out who wanted her dead.
When a young woman's body is found in Central Park, drained of blood and missing part of her ear, the CSIs jump start an investigation that takes them into the dark and mysterious subculture of vampirism.
The team must unravel the series of events from a wild night for a group of friends--a night which ended in four dead bodies, and a fifth person wandering the streets covered in blood and wielding an ax.
Dr. Hawkes is trapped in a cell block during a security breach orchestrated by a familiar face from CSI's past, and the only person who can help him get to safety is the death row inmate who murdered his sister.
A mother identifies her son as the attacker in a brutal assault that left her seriously injured and her husband dead. But later she recants her positive identification, and another unrelated person confesses to the crime.
The team tries to find out who is responsible for a jewel heist at the home of a powerful defense attorney. However, they soon discover that everybody who comes in contact with the jewels is turning up dead.
A married couple is led to believe that they have found their badly decomposed dead son in a car on the roof of a Wall Street building. However, further investigation reveals that the victim is one of the boy's college classmates.
As the CSIs investigate a case involving a woman who appears to have been scared to death in a supposedly haunted section of Central Park, Mac stumbles on another dead body buried nearby in the same part of the park.
After the woman who assumed Chief of Detectives Carver's deceased sister's identity turns up dead, and the evidence continues to mount, Mac begins to suspect that Carver may have been responsible for both murders.
After a man dressed in a clown costume kills a bakery owner, the evidence is soon connected to a man from Flack's past who reluctantly agreed to join witness protection to testify against drug dealers.
An exclusive party in the back of an 18-wheeler ends in death when the driver sends the vehicle into the Hudson River, and the team tries to figure out what happened. However, a mobster whose daughter was killed may beat CSI to the killer.
A dead body is found in the remains of a collapsed porch from a high school party, and the team discovers that she was strangled before the accident. Meanwhile, a serial rapist from one of Jo's past cases strikes in New York City.
The team tries to identify the shooter and motive in the assassination of a criminal court judge presiding over the trial of a Russian mobster, while Mac and Lindsay prepare for the hearing against serial rapist John Curtis.
Two people are shot and killed with a gun that was printed from a computer, and Jo tries to uncover the identity of an anonymous philanthropist who is giving away millions of dollars to random New Yorkers.