After sixteen-year-old Laura Spellman finds the brutally slain bodies of her parents, Horatio Caine vows to personally track down the killer and let Laura know she is safe. A scrap of paper with the lettering from a car rental company leads the CSIs to an important clue: the killer flew in from New York. Determined to keep his promise to Laura, Horatio boards a plane to New York, on the tail of Nick Murdoch, whom he believes is the killer. Meanwhile in New York, NYPD CSI Mac Taylor is called to the scene of a murder of an undercover officer identified as Nick Murdoch who has been strangled. Horatio arrives in New York and the two CSIs realize that the murderer had stolen Murdoch's identity. Mac agrees to hand over jurisdiction to MDPD. Their investigations lead them to one of New York City's richest families, the Hanovers. Michael Hanover, Sr. was murdered while his son survived the attack. The two teams must now find the link between the murders of two unrelated families and bring the perpetrator to justice before he strikes again.
The team finds three young women, all of whom appear to have been brutalized in the same way. The only witness they have is the surviving young woman, who can communicate only through blinking. Photographs found at one of the crime scenes lead the team to a couple that had sponsored one of the victims, and the boyfriend who claims he hasn't spoken to her in weeks.
Junkie Jordy Thompkins was shot dead in an alleyway, but the bullet that killed him is missing. Taylor and Hawkes soon realise that a rat may have eaten the bullet, and finding the rat leads them to a robbery that occurred earlier that day. After Robin Prescott is found raped and beaten in Central Park with only a peony leaf on her clothing, Stella and Flack have the daunting task of trying to find the man who raped her, but Prescott has no memory of the crime.
After a skeleton is found on a tour bus and turns out to be over a decade old, Mac and the team use the backpack they have found to track the belongings to a young man named Aaron Moreland, only to learn that the body they have cannot possibly belong to him. By tracing the victim's shirt, detectives are led to a youth center worker who claims not to remember the boy, but is hiding an old secret of his own.
On the very night that he wins a D.J. competition, DJ Banner is found dead in an alleyway outside the club where the contest is being run, prompting Mac and Flack to investigate not only the club but also Banner's primary competition, who was jealous that his girlfriend's voice was part of Banner's act. Stella and Danny investigate the death of fashion designer Deborah Gayle, found face-down in the pool at her apartment by her assistant, who isn't concerned by her boss's demise. An autopsy reveals that the cause of death was poisoning by tetrodotoxin, a poison found in blowfish, which leads Stella and Danny to Fuqua Sushi.
Stella and Aiden investigate after finding the body of a teenage girl in a creek. They soon realize that she was a middle-class girl attending a fancy school who was trying to make it seem like her family had more money than they did, and trace her movements to a nightclub. Mac and Danny investigate when a body is found in the tunnels without any protective gear on, and end up running into a brick wall when the Sandhogs union blocks many of their attempts to get information about the victim.
Terrell Davenport and Octavia Figueroa are the only survivors of a brutal slaying and robbery at a fast food restaurant that leaves Danny and Aiden scratching their heads when they can't find a suspect until they take a closer look into the life of one of the survivors. Mac and Stella investigate the death of a man who recently had his leg amputated, only to learn that there was no medical reason whatsoever why the limb had to be removed.
When the charred bodies of two men who had been robbing a Chinatown bank are found, the entire team investigates the crime, which leads them to Doris, the missing infant of the bank's manager. The team realises that Joanna Cho assisted with the robbery out of fear for her daughter's life. Mac and Stella finally manage to track down the third robber, only to find him lying in a pool of blood, with a trail of bloody baby handprints leading away from the body.
Danny and Mac investigate after a briefcase belonging to Luke Sutton is found left in the NYMEX with a bloody note inside. Their investigation into Sutton's activities lead them to Nick Lawson, whom Sutton had been investigating for illegal trades, but who swears he had nothing to do with his disappearance. Stella and Flack investigate the death of Trina Rolston, a young pregnant women who fell to her death from the roof of a church. With Hawkes help, Stella realises that the body was thrown off the roof to mask the true cause of death. The detectives soon realise that their two cases are connected.
After mounted officer Valasquez is shot down in the park, Mac goes looking for the bullet that killed the officer only to learn that it is lodged in the horse's spine and cannot be removed without being fatal to the horse. The investigation leads them to a local street vendor, but stalls when the D.A. asks Mac not to do anything to risk the horse until after the woman who donated it has a chance to say goodbye. Aiden investigates the body of a young man, Lenny Starks, who was found face-down, dead in the street. Aiden traces the young man to a local pizza parlor where she faces intimidation from the bookies who use it as a gambling front.
A game of one-on-one is interrupted by the discovery of a woman covered in blood leaning over the body of another woman who has had a stake driven through her heart. Mac soon realises the woman was sleepwalking and tried to save the victim's life, but the case stalls because she is the closest thing they have to a witness, and she has no memory of the event. Danny and Aiden investigate the brutal murder of a pickpocket whose identity they track down using information on an experimental medical trial. Money found in the victim's underwear leads the two to another pickpocket, but there is no obvious motive for Lenny Cook's death.
Mac and Stella investigate the electrocution death of a man found in a subway tunnel. Danny investigates the murder of a gallery owner whose death is connected to the mob. Aiden and Flack investigate the death of a construction worker.
Mac, Aiden and Flack investigate when Elaine Curtis is found dead at a dog competition, a knitting needle sticking out of her chest, and no shortage of suspects ranging from judges to trainers to contestants. Stella and Danny investigate the death of bicycle messenger Michael Starling, but the crime scene may have been anywhere along his route.
Mac and Stella investigate the death of Paul Montenassi, a young man left to bleed to death in the snow. The investigation leads them to another victim, Mihok Lev, who had been killed by Montenassi in a robbery earlier that evening. When Hawkes concludes his autopsy on Montenassi, he is able to reveal a sanded-off tattoo that leads the detectives to the Tanglewood Boys. Danny and Aiden investigate the hit-and-run that caused the death of Marta Santo. After discovering sperm on the woman's clothing, Danny and Aiden learn that Santo liked things rough, and their investigation leads them to an erotic massage parlor.
The body of a young trapeze artist is found folded into a box on Coney Island, leading Mac and Stella to the circus where they find themselves embroiled in a real-life Romeo and Juliet story between the dead contortionist, Lukas, and a trapeze arist, Anasuya. Danny and Flack find a woman's body in a laundry chute and learn that she was actually the former sorority sister of the woman who lived in that building, and turn their suspicion to the abusive husband the woman was hiding from.
The team's investigation into the death of Hannah Bloom, who died at her own wedding, is put on hold when her father refuses to allow them to perform an autopsy until after his daughter's body is blessed by a rabbi. Danny and Mac turn their attention to the woman who trained the doves who were supposed to be released, but cannot tie her directly to Bloom, who died from formaldehyde poisoning. Stella, Flack and Aiden investigate when a hand is found deep underground, and soon realise that the dead man, Rick Amadori, chewed off his own hand. It seems like a slam dunk when the son of a man Amadori killed three years earlier confesses to the crime, but things aren't as easy as they seem.
Mac and Stella investigate when they find the body of Paddy Dolan, a longshoreman. Part of the body is found on a transport truck and another part back at the warehouses, but Mac encounters difficulty with the investigation when the workers put up a wall of silence against them. Aiden and Danny investigate the death of Debbie Bogda, who was found naked on the expressway, and their investigation leads them into a world of sexual games and bondage once they realise she was actually harnessed to the front of a truck.
When young gang members murder the owner of an upscale Bronx wine store, the CSI’s must work to find evidence that ultimately ties someone to the crime. Before dying, the storeowner makes a statement to police identifying his attackers as young gang members. Tempers flare when the murder investigation reunites Detective Flack with his long-time mentor and friend Sergeant Gavin Moran, who was the first to arrive at the crime scene. Meanwhile, Danny and Aiden investigate the death of an influential movie producer found dead on the canopy of his Chelsea apartment building.
When the chief investigator of a controversial report documenting corruption within the NYPD is gunned down the day before his findings are published, Mac and Stella must find the killer, launching a massive search that makes every officer listed in the report a suspect. Meanwhile, Danny and Aiden investigate the murder of a gypsy cab driver.
When the body of a young woman is discovered at a laundry facility, the bed sheets she is wrapped in lead Mac and Stella back to an upscale New York hotel that houses diplomats from around the world when the United Nations is in special session. Meanwhile, Danny and Aiden investigate the death of a homeless man found dressed as a human statue. By all accounts, the prank is deemed a misdemeanor, but Danny decides to delve further and his refusal to stop the investigation puts him at odds with Mac.
When a college student is beaten, shot to death and his apartment ransacked in what appears to be a drug-related hit, the team must track down his killers. After examining the evidence in the murdered student's apartment, the team finds traces of pure, unprocessed heroin and discovers that the victim had a female roomate who is now missing. Meanwhile, Stella's aggressive interrogation tactics with a witness threaten her police badge.
While processing a crime scene, Danny is suddenly attacked by a suspect hiding in the victim's closet. The ensuing chase leads them to a crowded New York subway where the suspect, an undercover cop and Danny all fire shots. When the smoke clears, the team is left with a dead cop, a missing suspect and Danny under investigation for the possible murder of the officer. Mac must prove who killed the cop in order to save Danny's job. Meanwhile, Stella investigates the death of a nanny killed in a Central Park restroom.
The team examines the murder of an avid Boston Red Sox fan found dead with a ruptured spleen following a tough loss against New York. Danny must put his baseball skills to the test to piece together the evidence as the CSIs try to find out how and why he was murdered. Meanwhile, after testifying in a murder trial, Mac is confronted by the defendant, Quinn Sullivan, who questions the validity of the evidence. Mac is torn between trusting science or his desire to help a man facing jail time who swears he's innocent. Also, when a truck kills a barely clad woman early one morning, the team investigates why she was running through the streets and from whom.
While Mac dines at his local breakfast spot, a gunman opens fire, leaving a waitress critically injured and a man dead, and Mac having to choose whether to chase after the suspect or save the life of the young woman. Meanwhile, before the chaos, Mac was approached by a shy patron who awkwardly engaged him in conversation. After feeling that he saved her life during the shoot out, she asks him to join her for a drink and Mac must decide if he is ready to start dating after his wife's tragic death.
Stella and Danny investigate when a jewellery designer is found dead, wearing the eight million dollar bra he created, and investigate the model he had shot and her bodyguard. Aiden begins to take the rape case she has been working on a little too personally, and is determined to stop the man before he can rape again. Hawkes gets to go into the field for the first time as he assists Mac in investigating the death of a man who liked to climb skyscrapers.
Stella and Danny are heading into the world of cuddle parties: non-sexual events were adults learn to touch and hug each other. Meanwhile, Mac, Hawkes, and Flack investigate the death of a hated plastic surgeon found covered with lye with thousands of eyewitnesses during rush hour at Grand Central Station. While Mac and Stella assist Aiden in a rape case, after she breaks an evidence seal, Mac must come to terms with Aiden's action and work up the nerve to fire her.
Mac and Danny look into the mysterious death of a man torn apart by tigers at the Bronx Zoo, which leads them to both the dead man's meat packing plant as well as his mafia relatives. Hawkes and Stella are left with the case of a beautiful young debutante found dead on the carousel only hours before her coming out.
Mac Taylor and his team investigate a double murder at an oil company. Dr. Hawkes and Det. Flack team up to investigate a case about a teenager who loved to spend his time behind the computer a little too much.
Mac, Stella and Flack investigate the death of a young dancer who recently won the lottery, and it isn't long before they realise that her death is connected to Lindsay's investigation concerning the death of a tram driver. Danny and Hawkes look into the murder of a local fish merchant, and soon find their way to a jealous friend who was angry that their child didn't get into a prestigious school.
When a man is found murdered in an elevator, Mac, Flack, Danny and Lindsay investigate a world where very young girls enjoy sexual encounters with much older men. They're left trying to determine whether their best lead is a suspect, a witness ... or the intended victim. Stella and Hawkes investigate the death of a young man found in Central Park who died from an extreme allergic reaction and learn that he had been pretending to be someone that he wasn't.
(Crossover episode with CSI: Miami, Season 4 Episode 7.) Horatio Caine follows Henry Darius to New York so that he can keep his promise to a young boy in Miami, but by the time he and Mac are able to locate Darius he has disappeared again, leaving behind six more bodies. A link to the younger sister of one of the victims who was also Darius' hostage turns out to be a dead end, but Mac and Horatio soon find the connection between Darius and his hostage, leading them to a psychiatrist who had treated both.
Mac and Stella investigate a murder of a host of a high stakes poker game after a player was caught cheating and kicked out of the game. While Danny and Hawkes follow the clues that'll lead them to solve the death of a weather girl.
Mac, Danny and Lindsay investigate the death of owner of a doll hospital. Stella and Hawkes look into the death of a woman with terminal cancer.
Mac and Stella work on the case of a female roller derby player. Danny and Hawkes look into the murder of one of New York's upcoming crop of writers.
Danny and Stella find innovative ways to process a crime scene while Danny is trapped in a panic room with the victim, who was the only person with the security code. As a locksmith works to cut through the titanium doors, the CSIs rush to process the evidence before the victim decays further and Danny's oxygen runs out. Meanwhile, Mac, Dr. Hawkes and Lindsay investigate the murder of an exotic dancer found dead on a klieg light
Mac, Danny, and Dr. Hawkes investigate the death of a runway model who collapsed during a fashion show. Meanwhile, Stella, Detective Flack, and Lindsay investigate a teriminally ill patient's confession to the murder of his doctor.
Danny is on his way home after a long shift and finds Randy Williams subway surfing. Mac and Lindsay arrive on the scene and begin to wonder if Randy Williams died from riding on top of the subway. His death is even more suspicious after they examine the body more closely.
Stella is invited to an art gallery where she sees several paintings done by an artist named James Golden. Stella thought she was going to Frankie's place and not to an art gallery. Outside the exhibit two people are kissing and one of them is shot in the back with an arrow.
Lindsay, Stella, and Mac are on the case of a dead ADA, who they discover, is involved in a "kill war" with water guns. Meanwhile, Danny and Hawkes investigate the murder of a young lady who had a penchant for suing restaurants and taking them for all they are worth.
After the body of a dead woman is found in a water tower the team suddenly realizes that the building may hold a bigger mystery than they expected.
A young boy witnesses the death of a museum curator but doesn't want to tell anyone about it. Danny investigates the death of an urban golfer found dead on a construction site.
The life of a transplant patient hangs in the balance as the team tries to find the hijacked plane carrying the liver.
A man dressed in a superhero costume is found dead in an alley, after saving a man being mugged. Mac, Stella, and Dr. Hawkes find his clothes in a nearby phone booth. Danny and Lindsay investigate the murder of an NFL first-round draft pick, known as "Superman."
Mac receives a phone call confessing to an old murder before the caller commits suicide. The call leads the team to a football stadium to uncover a body and they learn the suicide victim belongs to the Tanglewood gang. They also find a cigarette that puts Danny's job on the line after his DNA is found on it. Stella and Danny investigate the death of a businessman who used the services of an expensive call girl service.
Mac and Lindsay question Kid Rock because he was the last person to see his limo driver alive when the driver is found dead in the alley just before Kid Rock’s encore performance concert.
Two women both claim to be the wife of a murder victim surprise Mac and Stella at the circumstances of their relationships. Both women have been in a trinogamous marriage with the victim. Meanwhile, Danny and Lindsay investigate the murder of a young woman who is found off a dock tangled up in kelp while she is dressed as a mermaid.
Mack and Danny find marine corporal dead but if things don't seem right about his death. They find a drop of blood on his sleeve new signs of a struggle and several medals on his uniform. They both wonder why the Marine didn't fight for his life. Stella, Lindsay, and Dr. Hawkes are all busy investigating a dead body in front of a car they believe the body to be that of Charles Wright. There is one slight problem Sid confirms that the body found in the car is not Charles Wright. The body however in the car is a female. After Sheldon carefully begins facial reconstruction of the skull he would use a tool that will allow him to import this call into the computer so he can match a face to that skull. Sheldon comes up with a surprising result. The skull and the photo match that of Aiden Burn.
In the season finale Mac Taylor has a lot on his plate. He must come to grips with having let a marine die in Beirut in 1983. Also the team must stay one step ahead of a bomber.
The body of a man is discovered on the Brooklyn Bridge, and the only evidence is a huge marriage proposal in lights. The CSI team works through the investigation as they learn to deal with a new medical examiner.
Three women who are dressed as Holly Golightly rob a jewelry store and injure other shoppers in the process. The CSI’s must work through the confusing investigation to hunt them down. Meanwhile Mac has to identify a mummified body discovered in an apartment building that was being torn down.
Danny and Lindsay examine the murder of an ice princess at a vodka release party while Mac, Stella, and Don examine the death of a runner at a Marathon in Central Park. Both crimes have interesting problems the teams must overcome to find out how they both happened.
The body of a beheaded woman found in a fraternity house is a mystery to the CSIs. Now they must sort through twisted clues and crime scene after crime scene to find the killer that has them trapped in his own little game.
The CSI's handle to puzzling cases; Carensa is a young Suicide Girl who at 17, wanted a change of scenery and to become a Suicide girl, at 18 she gets her wish only to lose her life. Chopper, a rising street basketball star, a homeless man trying to change his life for the better is killed and leaves a painful trail of blood which leaves Mac to figure out where and how he died.
The CSIs are investigating the murder of a hotel concierge, but while doing this they hear gun shots fired across the street and find a woman clutching a gun over two dead bodies.
A young woman dies after she starts bleeding from the eyes, nose, and mouth while at a party aboard a subway train. Mac originally believes she is the victim of a biological attack. Later, it is revealed that Sheldon knew the victim. Across town, a wealthy playboy is found dead in an indoor lap pool in his penthouse suite. The investigation reveals that he was murdered and his last maid was fired two days earlier.
The next case for the CSI’s gets even tougher when a paintball player turns out to be the prime suspect and later goes missing the team also has another problem the evidence that should point to the prime suspect points to someone else.
The next case takes us back to Dr. Sheldon Hawks' past and the reasons he chose to change jobs in the medical profession. The CSI team may find it extremely difficult to find out who committed the murder of the 19-year-old woman who recently started recovering from an accident.
The team is lead to a crime scene imvolving a parachute jumper in the middle of the city, whos parachute aparently failed. And one CSI is injured when a snake is found at a crime scene
After a bartender is murdered The CSI team must prove that Hawkes did not commit the murder. That only becomes more difficult when the team is pulled off the investigation.
The CSI team has a problem after learning the family is deaf: now they have to find a new way to catch the killer. Meanwhile, more information is given on Lindsey's horrifying past and what led her to become a CSI.
The team must find out if one team’s fun led to murder in the New York version of the Iditarod.The CSI must find who or what may have caused a rich man to be alone in his apartment.
Can knowing a secret be a motive for murder? The CSI team must figure out if a change in gender is cause for the death of a showgirl. Also Lindsay goes back to Montana to try to put the person who committed the murder of four friends behind bars.
Reed Garret gives Mac some interesting information regarding the death of a college student. Also the rest of the team will need to be a step ahead of Ava Brandt to figure out why a security guard was murdered.
Mac may have a difficult time solving the murder of a music mogul the sister cleverly uses a lie detector test to cover up the crime. Stella wonders if she has HIV due to an accident.
Danny and Mac have to go to Noah’s Ark to find out if a broken promise leads to his murder. Stella and Sheldon investigate the death of a man dressed as a cigarette. Stella hopes to keep her job after not telling Mac that she may be HIV-positive right away.
Illusionist Luke Blade may have to defend the art of magic after an illusion is thought to have killed two women. Back in Montana Lindsay will need to take herself back to the time when she was fourteen to help her remember the crime that killed four friends in order to help convict of the person that killed them.
At a French Revolution themed fundraiser at the UN, specifically at the French consulate, Mac, Stella and Hawkes find themselves hurdling diplomatic road blocks investigating two murders. Meanwhile, Danny and Lindsay reunite on a “blinged” out cockroach that lead to murder.
The team finds itself investigating the murders of three different people, only to discover that two of the murder victims are linked and may have been killed by the same person. One of these cases becomes personal for Mac.
Trouble begins for Mac when Clay Dobson becomes a free man due to a mistake he made. Stella learns the results of her HIV test from Adam.
Mac believes he can fight the internal affairs investigation that is about to be started against him because of what happened to Clay Dobson. Can Mac explain what happened to the suspect he was chasing and will it be good enough for him to keep his job? Also Stella could lose her job as a CSI after a cold case is somehow connected to her.
Can the team clear a tennis legend of murder? Also Mac believes that the continuing investigation into what happened with Clay Dobson is nothing but media pressure. Can friends and colleagues help save Mac Taylor’s career before it’s too late?
After Flack makes an enormous drug bust, and locks it up at CSI, the drug lords infiltrate the building at gunpoint to get them back. Now the team must resolve the hostage situations, all the while with Mac, Stella, and Hawkes trapped inside.
As the fourth season begins the team find themselves investigating something that isn't usually on the Statue of Liberty. Can a musician's life be saved before time runs out?
Sheldon Hawkes goes under water to gather clues but could be in danger when he can't come up for air. Mac learns of something else under water.
After a series of heists in the city (one including Det. Chief Sinclair's house) one of the "super spies" involved is robbed of his life. The team works to solve the robberies and the murder, as both are obviously connected.
Is it possible to solve a murder 24 hours before it happens? Mac wonders if the suspect traveled through time to know about the murder in advance.
The latest murder case takes Detective Taylor to a whole new world and he must figure out why Cheryl Duncan looks so life-like. They also discover something shocking about the murderer while online.
The CSI team goes to a haunted house to solve more than just the latest case. Before they can solve the crime Lindsay is told something will happen to her if she doesn't leave soon.
The team has two cases tonight and two great tourist locations: Madison Square Park where a man is stabbed to death, and the Metropolitan Museum of Art, where a woman is shot dead on the steps. What is even more perplexing about these cases is that the team soon realizes that these two victims hold something criminal in common.
New York City has everything: Times Square, billboards, parties, and a dead model in a giant martini glass. Now the team must find a party crasher who crashed one party too many.
What would otherwise be a happy wedding goes sour when the groom... turns up dead: inside a wedding present. After Stella finds bloody puzzle pieces inside a box on her car, Mac heads home to Chicago to solve what could be the murkiest mystery of his life.
While in Chicago Mac uncovers more clues about his stalker and reveals his troubled past. Meanwhile, in New York the rest of the team is in danger. The hunt is on to figure out the identity of the 333 stalker before time runs out.
Danny is devastated when a young boy he knows is killed in the midst of a bodega robbery. Meanwhile, Lindsay, Stella and Flack investigate the death of a man killed by an exploding cigar that is connected to a joke shop proprietor and another tragedy that occurred years before.
Mac and the team feel they're headed back to Kansas when they find the victim's body with red shoes on her feet crushed to death under an unusual object. The team learns about pop up parties after finding a body.
In this episode Mac and his team must figure out how a woman's death and a judge's murder are connected. Danny has trouble dealing with Ruben Sandoval's death.
The team must figure out how a self-cleaning restroom leads to a drowning. The team also investigates the death of a man who was set on fire and flew into a fire truck.
After the CSI's receive an anonymous tip they're led to an old warehouse hoping to catch one of New York's most-wanted criminals.
Stella's life is in danger after her apartment is on fire; she must try to save everyone in the building. The team also has a mystery to solve after finding a dead body in Stella's apartment building.
The team must figure out how a young woman and a shark end up dead on the beach at the same time. This case gets even more interesting when a second body washes up on the beach. Quinn Shelby observes the team at work to determine if the lab should get their annual accreditation.
When a guidance counselor is murdered at a private school, the mayor orders Mac and his team to drop everything to find out what happened. Mac is frustrated because he can't devote the man hours or the personnel to finding the "Taxi Cab Killer".
As the search for the taxi cab killer continues riding a cab gets very deadly. The team must figure out how to keep New York City safe. Also Danny, Lindsey, and Flack investigate the murder of a man who made a half court shot during a game that both Danny and Flack were attending.
Mac and his team finally believe they have captured the taxi cab killer but there is one problem - he is found dead. Mac must figure out how to keep the streets of New York City safe while continuing to track the elusive taxicab killer
When a man takes hostages during a failed attempt to rob a bank, Mac offers himself in exchange for a hostage. Only condition is that he must prove that the bank robber did not kill the bank manager, whose body is found lying in a pool of blood in the vault. On the outside of the bank, the rest of the team works to process the evidence that Mac finds and stop the SWAT team from making matters worse.
Picking up where the season 4 finale left off. The team is investigating the death of a woman named Lauren Santana whom is linked to the bank robbery. She is a friend of Flack's sister Samantha. Also Mac has escaped the robber but the bodies are still piling up. So the team must quickly find the bank robber before he is able to get away.
A series of deaths from radiation poisoning may be related to a deadly tome in the New York library.
When a supposed air marshal is murdered on a flight to the District of Columbia, Mac searches the plane for the killer and the murder weapon.
The team investigates the puzzling death of a woman named Ann Steele. To solve the case, the team must look for a life size silicone doll. When the team runs into the factory that makes them, it prompts some amusement for some of the team. Meanwhile, Hawkes meets up with an old college friend who later asks him to compromise some evidence in the case.
The CSI team investigates the shooting death of an archaeologist whose secret life may have caught up to him.
Three drug dealers set to stand trial are found dead in separate places. They were all trying to get rid of witnesses in their crime, but it looks like someone got them first.
The team investigates the brutal murder of a house relocator who was found dead inside a Victorian house that he was about to move from Staten Island to The Upper East Side.
In the one hundredth episode of CSI: NY Mac faces his most deadly foe yet. There is a serial killer loose in New York City killing people with the name Mac Taylor making Mac a target.
A woman is found in an auto wrecking yard and a man is found in a trunk, two separate cases for the CSI team to investigate.
The team is forced to investigate two crimes at once when a mysterious energy field seems to be the cause of a billionaire's disappearance and the death of his limo driver.
Mac runs into Ella McBride who could cost him time in figuring out if Isabelle Vaughn died by eating the miracle fruit. Stella gets in trouble with Mac while investigating another murder linked to the Greek diplomat that attacked her.
Young brides-to-be fight over a killer dress at the biggest wedding gown sale of the year and one of the shoppers winds up dead. The unusual clues of this case force Dr. Hawkes to confront a painful chapter from his past.
The CSIs must piece together a human jigsaw puzzle when a beloved wrestling coach's severed body parts are found buried throughout the city. Meanwhile, Detective Flack is in the hot seat when a teenage suspect dies in his custody.
A Russian tourist is found stabbed to death and the CSIs come face to face with the frightening realities of human trafficking. Solving this case becomes personal when it directly affects a prominent member of the NYPD
When the Deputy Mayor's dead body falls from the ceiling, along with hundreds of balloons, at a charity fundraiser, Stella and her date find themselves in the middle of the crime scene and Mac goes head to head with Robert Dunbrook.
When a buzzard flying over Manhattan drops a human eyeball from its claw, the race is on to find the body it belongs to before the avian saboteur flies away with the rest of the evidence.
A lethal pipe-bomb blows a Manhattan townhouse and valuable evidence to pieces, forcing the CSIs to get creative in reconstructing the damaged clues that ultimately lead to the bomber.
When the wife of a former medical examiner is found murdered, a white powder found at the scene provides the CSIs with a major lead in tracking the killer when it is discovered that the powder is heroin made from human bodies.
When a Native American chief is shot on the subway, the CSIs struggle to translate which one of the several foreign suspects may have caused his death.
While investigating the shooting of a voice coach in an empty theater, Stella realizes that the crime scene is oddly familiar and staged.
When a man falls 20 stories to his death, and his body goes missing after it hits the ground, with no body to process, the CSI's must treat this strange development as a missing persons case.
The most exclusive jewelry auction of the year ends abruptly when an appraiser is killed during the event. The investigation takes an emotional turn when the CSIs must confront one of the greatest tragedies in human history - the Holocaust.
Mac informs an ex-con that he served time for a crime he didn't commit, and Lindsay tells Danny "it's time" for the first CSI baby to be born.
When Stella discovers that New Yorkers are being murdered over ancient Greek artifacts, she hands over her badge to follow a clue that leads to Greece and, together with Mac, she uncovers one of the greatest mysteries in history.
When transferring Robert Dunbrook's son from prison to court, the NYPD is ambushed by a group of professional kidnappers who kill a member of the team and one of the CSI's lives hangs in the balance.
Danny and Mac have yet to get any leads on a cop killing when Danny gets an impromptu call from a young woman who claims she's got information about the case...
(Featuring Grave Digger) The case of a cyber killer, who appears to be targeting medical healthcare workers, turns personal when the suspect invokes the name of Mac's father who had died nearly two decades earlier.
When two bodies are discovered at the North and South ends of the city, Mac and the team deftly begin to navigate the trail of evidence left behind by the killer.
Incriminating DNA evidence contradicts the confession of a scorned woman claiming to have brutally murdered her cheating husband.
A street dancer who wins $10,000 in a dance battle is seemingly robbed and killed in his hotel room while celebrating with his girlfriend, but the money is left untouched...
Hawkes responds to an emergency call in Central Park, but dismisses the case as just a drunk with a nosebleed, a complete waste of his time. When the man later bleeds out and expires, Hawkes bitterly blames himself and sets out to trace the circumstances of the man's mysterious and untimely death...
(Crossover episode with CSI: Miami, Season 8 Episode 7 and CSI: Crime Scene Investigation, Season 10 Episode 7.) Which presumably seemed to be a traffic accident, turns out leading to homicide and illegal organ harvesting. The chase of those involved in the slaughter chain makes all three NY, Vegas and Miami CSI teams put their efforts together to put an end to the crimes. Hawkes, in particular, is very upset about the case.
The Compass Killer is back, and adds yet another to his circle of victims -- but this time the CSI squad knows his name; Flack's alcoholism threatens to derail his career...
In the culmination of a multi-episode mystery, Mac and his team uncover the dark lair of a murderous madman, the Compass Killer. But as they race to save his fourth victim, the sunrise presents one final surprise that no one ever expected.
A frantic 911 call sends the CSIs into a vacant penthouse; however, instead of finding the caller, they unearth a nearly 100-year-old corpse and find themselves navigating their way through a booby-trapped house.
A reformed drug addict with everything to live for is found dead in an alley. The CSI's discover he was the victim of a premeditated plot.
Mac is shocked when a long-time friend and associate winds up the chief suspect in a murder investigation...
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.
After a young woman is found dead in the Central park snow with a puncture wound in her neck and the blood drained from her body, the CSI team works to find out who stopped her from ever seeing another new moon...
The CSIs get immersed in the world of F1 racing to investigate the death of a pilot in the Seraphim Racing Team. Soon they'll discover that speed, adrenaline and sponsors aren't always all that comes into play.
The team investigates the particularly gruesome outcome of a 21st birthday where the party plans became all but anything worth celebrating. With just a few and not easy answers as their only lead in the case, the CSis are challenged to stretch their abilities to the limit.
it's St. Patrick's day, and all of New York City is ablaze with a hundred shades of green -- except for an abandoned warehouse in Brooklyn, where two corpses have left a tiny part of the city drenched in red...
After MARINA GARITO is found dead, an apparent suicide, Stella Bonasera is convinced that the dead woman has been murdered, and she painstakingly assembles a mass of forensic evidence to support her gut instinct...
A death row inmate's final request brings Dr. Hawkes to a Pennsylvania prison and face-to-face with a tragic incident that he has kept secret for many years, just as a prison riot erupts and traps Hawkes inside.
When a slab of concrete starts bleeding in midtown, the CSIs' investigation takes them into the underground world of hardcore fighting, where men moonlight as "weekend warriors" for the pleasure of a live viewing audience.
When Mac and Aubrey come across the scene of a 14-year-old boy who has been shot in front of his 12-year-old brother, it takes Mac's drive for justice to another level.
While Mac recuperates at home after being injured, he witnesses a mysterious briefcase exchange that leads to a murder, and unexpectedly brings him in contact with his former girlfriend, Peyton Driscoll.
The CSIs follow a trail left by Shane Casey and realize that he is targeting Danny, who is vacationing out of town with Lindsay and their daughter, on the sixth season finale of CSI: NY.
The newest member of the CSI team, Jo Danville, a former FBI agent, is welcomed to her new job by stumbling upon the body of a young woman murdered in the 34th floor of the building that houses the NYPD Crime Lab.
When a young woman appears to have been strangled while participating in a live online chat, the team must determine if it was a hoax or murder.
When a married couple are found beaten in their home, a woman identifies her son as the killer, but another witness comes forward.
In the delicate balance between gangs in the Spanish Harlem those who see but don't speak are the ones to survive.
A jewel heist at a powerful attorney's penthouse takes a bizarre turn; the case leads the CSIs to a seemingly unrelated man in the morgue.
The path of team's most recent investigation crosses that of some desperate parents in search for their missing son.
When a series of heinous crimes strike the city, Mac finds himself between the devil and the deep blue sea; his duty to protect and serve gets in conflict with his superior's orders concerning how to handle the media and civilians' right to know.
A park runner tries to escape from her killer; soon afterwards, a second victim that could be connected to the case is discovered.
A body is found buried in Central Park together with the murder weapon.
When a winter wonderland window display is unveiled, it turns out to be a crime scene.
Following the death of a bakery owner, a clown becomes a suspect whose life hangs in the balance because of Det. Flack.
A Spanish club promoter is found dead in his apartment. The family's decision to bring the body back home might compromise the investigation.
A father seeks justice for his daughter's death but getting the answers could get him in trouble.
A shooting in a lounge leads the team to investigate the whereabouts of a nurse linked to one of them who has gone missing.
When a rapist is found dead in a warehouse, the CSIs must determine if any of his victims is responsible for the murder.
A woman contacts Mac as she has some information about a possible murder. However, before Mac gets to meet with her, she ends up dead because of the information she has shared. Mac is left with more questions and two murders to solve.
When a popular student and star pupil at Manhattan's most elite private school is murdered, the CSIs find themselves immersed in the highly competitive world of over-privileged youth.
Jo's adopted daughter is a witness to an attack on the subway and learns the truth about her real mom.
The team must figure out why a food truck suddenly exploded killing its owner. They also must see if the complaints filed against him had anything to do with his murder.
The team has to figure out if they have a killing spree going on after two women are dead and a third woman has to be found.
After a hail of gunfire tears through the crime lab, Mac and his ex-partner become part of a vendetta 17 years in the making.
Mac tries to find a little girl missing since 2002 who saw the murders that took place at the time of a burglary.
The tenth anniversary of 9/11 proves a wrenching but clarifying passage for Mac, who suffered a terrible loss on that day. Meanwhile, an open-and-shut robbery/homicide proves more complicated than anyone had anticipated.
When an awkward teen is found dead, the team discovers that his efforts to win a sexy punk rock chick's heart may have gone a step too far.
When the body of a beautiful young woman is found in a stolen Ferrari, the investigation leads to a family of car thieves, but the CSIs must find the murderer before the rest of the family meets the same fate.
A night out for a friendly drink takes an unexpected turn when Danny and his rookie cops are caught up in a shooting.
The CSIs investigate when the recently paroled brother of a young basketball prodigy is implicated in a murder.
The CSIs investigate when a fraternity prank goes awry on Halloween and a pledge master is left for dead in an open grave.
A video of a high school party causes the team to wonder if too much weight on a porch caused the death of a girl. Jo has to deal with her former partner bringing memories of her last F.B.I. case.
As the CSIs investigate the assassination of a judge, Jo comes face to face with a criminal from her past.
When an important witness turns up dead, Det. Jo Danville is caught up in the dangerous investigation of the suspected rapist who was freed on her and her colleague's Frank Water's watch in D.C.
The team investigates a cage fighter's brutal murder and the possibility that he was killed by his stalker.
A home invasion investigation becomes more complicated when the victim's family turns out to be less perfect than they originally seem.
The CSIs investigate when a role-playing game turns lethal, with one player falling victim to a bona fide killer and the other kidnapped and held for ransom.
Two seemingly unrelated deaths share a surprising connection.
Mac and the team are deeply affected as they must investigate the murder of one of their lab techs who found murdered on the stairs of a vacant brownstone. The building was the scene of an unsolved murder of a famous socialite in 1957 and the scene was staged so that everything matches the previous case. Also, Mac's relationship with Christine continues to grow as he joins her for a family party
The CSI unit finds itself immersed in the world of competitive video gaming when they discover a murder may be related to a high-stakes tournament
The team is surprised by an explosion after a wave of brutality threatens a small New York City community when a body is found dismembered and strategically left out on four street corners.
The CSIs are called to a Brooklyn housing project to investigate the murder of a successful businessman who still felt the pull of his old neighborhood.
Mac fights for his life after getting shot.
The CSIs investigate when a fire chief – a friend of Mac’s – is killed in a blaze that used the same technique as a recently paroled arsonist.
The CSIs rush to stop serial arsonist Leonard Brooks after he begins using fire against people from his dark past.
The CSIs race to San Francisco in search of a 16-year-old girl who may already be dead, and the case hits home for Jo.
The CSIs race to catch a shooter when Lindsay is injured during the attempted murder of a political candidate, and the events in the aftermath lead to a child’s death.
Mac investigates a 20-year-old case involving a missing boy when the prime suspect is found murdered on the anniversary of the boy’s disappearance. Meanwhile, Flack’s day off helps him deal with some lingering family issues.
When two little girls are stuck waiting for their mom at the NYBPD bullpen, Adam regales them with a tale of intrigue. After draining a lake to find a murder weapon, the CSIs discover a fresh mystery: the body of a woman in a ballgown -- perhaps she's a princess?
When a psychiatrist’s patients are being systematically murdered, the CSIs are forced to play along in a game of CLUE in order to catch the killer.
The CSI team investigates the murder of Luke, and finds his death linked to the sale of performance enhancement drugs; Lindsay returns home to Montana, to witness the execution of Daniel Katums.
Detective Lovato's past as an undercover officer tangles up with her present duty when one of the gang members she ingratiated herself in and developed feelings for turns up tortured and killed.
The CSIs investigate a 1920s-inspired speakeasy when one of its owners is murdered and $10,000 goes missing. Meanwhile, Adam spends his day off in an unexpected way.
The CSIs are confronted with a puzzling mystery when two different victims are linked by the same unusual weapon.
When a beloved off-duty NYPD officer perishes in a robbery, the CSIs use the art of interrogation to break down their suspects and get to the truth.
The CSIs investigate when a masked man is found at the bottom of a notorious skyscraper known for its history of mysterious deaths. Meanwhile, on her day off, Jo runs into a stranger with a surprising link to her past.
When a young pizza maker is carjacked, the CSI's must determine what the perpetrators were really after.
Mac and the team partner with D.B. Russell to outsmart Christine’s kidnappers before they run out of time to save her life. Part 2 of crossover following CSI 13x13 'In Vino Veritas'.
On Valentine's Day, Mac and the team tackle three twisted tales of love gone wrong.
Unrest erupts in a community where an unarmed man was shot by police which means the CSI team needs to work as fast as possible to solve the case.
