На работу в криминалистическую лабораторию Лас-Вегаса поступает новичок — Холли Гриббс. Криминалист Гил Гриссом расследует дело об убийстве мужчины, которое было замаскировано под самоубийство. Ник Стоукс расследует дело об ограблении, в котором подозревается проститутка Кристи Хопкинс. Уоррик Браун и Кэтрин Уиллоус расследуют убийство бездомного мужчины.

Гриссом расследует дело о мужчине, который ночью выиграл большую сумму денег в казино, а утром был найден мёртвым. Джим Брасс уходит с поста главы криминальной лаборатории, и становится начальником убойного отдела. Гил Гриссом становится главой лаборатории. Уоррик винит себя в халатности, приведшей к убийству Холли Гриббс. Из Сан-Франциско для проведения внутреннего расследования приезжает криминалист Сара Сайдл.

Гриссом, Ник и Сара Сайдл берутся за дело о похищении жены миллионера, в то время как Уорик и Кэтрин расследуют дело о наезде автомобиля на девочку.

В озере найдена отделённая от тела нога. В это время прием новых членов в Братство колледжа омрачается неприятной ситуацией.

Молодой человек найден голым и мёртвым в пустыне. Грисон и Уоррик берутся за это расследование. Тем временем Ник и Кэтрин пытаются определить, как учительница одного из местных колледжей могла забить до смерти декана, а Сара выяснить почему тело, по всем признакам захороненное, оказалось на свалке.

Протокол расследования нарушен, когда Кэтрин берётся за дело, в котором подозреваемым в насилии является её бывший муж. Гил и Ник выясняют личность скелета, обнаруженного в фундаменте одного дома при ремонте труб, для чего вызывают лучшего специалиста на материке по восстановлению лиц. Уоррику и Саре досталось самое трудное - доказать или опровергнуть утверждение о том, что водитель покончил с собой при захвате патрульным, когда на первый взгляд все улики против последнего.

Вся ночная смена CSI расследует преступление в доме, где вся семья, кроме двух дочерей, была убита без очевидного повода.

Гриссом, Кэтрин и Сара исследуют очевидное самоубийство, но сразу понимают, что смерть была не только организована, но почти идентична делу, который Гриссом изучал за несколько месяцев до этого (в эпизоде 1.01). Дело принимает неожиданный поворот, когда на месте преступления найден отпечаток пальца Гриссома. Уоррик и Ник, тем временем, изучают автомобильную катастрофу, и у каждого есть своя версия произошедшего.

Вся команда криминалистов расследует смерть пассажира на борту коммерческого авиалайнера. Гриссом, Сара и Ник исследуют салон самолета, Кэтрин и Уоррик допрашивают пассажиров. Однако вскоре становится ясно, что показания пассажиров не сходятся с уликами на месте преступления. К тому же, вскрытие трупа показывает, что у погибшего было серьёзное заболевание. Кто, или что, убило его?

Сара и Гриссом расследуют смерть женщины, Кэй Шелтон, найденной в горах. Чтобы установить время смерти, Гриссом изучает насекомых, которыми был облеплен труп женщины. Кэтрин и Уоррик расследуют похищение картины. Ник в одиночку ищет пропавшую женщину.

Гриссом и Кэтрин расследуют дело о пропаже женщины из супермаркета. Выясняется, что здесь действует серийный убийца. Сара и Уорик занимаются делом об убийстве при ограблении. Ник Стокс снова встречается со знакомой, влипшей в очередные неприятности.

Гриссом получает по почте видео от заключённого Франка Дэймона. Фрэнк осуждается за поджог дома, в результате которого погибли его жена и сын, но сам Дэймон утверждает, что он невиновен и просит, чтобы Гриссом помог ему. Гриссом соглашается повторно расследовать дело, несмотря на недовольство Экли, который и проводил расследование. Ник и Кэтрин, тем временем, работают над делом застреленного в автомобиле молодого человека.

В холле офисного здания взрывается бомба. Несколько человек ранены, охранник убит. Подозрение падает на второго охранника, любителя-бомбодела. В то же самое время Ник Стокс, пребывая в отпуске снова сталкивается со знакомой. А потом его начинают подозревать в её убийстве.

Обнаруживаются разбросанные кости человека на горе Чарльзтон. Собирать кости и выяснять их принадлежность берутся Гриссом, Кэтрин Уиллоус и Ник Стокс. Уоррик Браун и Сара Сайдл расследуют дело об убийстве стриптизёра в отеле.

На благотворительной вечеринке с присутствием высокопоставленных лиц обнаруживается труп женщины в бассейне. За дело берётся Гриссом с командой. Уоррик в одиночку пытается расследовать убийство мужчины.

Неизвестную женщину похищают и оставляют умирать на дороге с двумя пулями, засевшими в её голове. Женщина находится в коме, а за дело берутся Гриссом, Сара и Ник. Кэтрин и Уоррик пытаются разобраться в запутанном деле, где сосед застрелил соседа. Показания жены обвиняемого и раны на теле убитого противоречат друг другу.

Обнаруживается труп мужчины в магазине, а рядом вскрытый сейф. Здесь же, в магазине, Гриссом находит отпечаток пальца женщины, похищенной 20 лет назад ещё девочкой и которую до сих пор считали погибшей. Насколько связаны эти два дела, предстоит выяснить. Уоррик и Сара занимаются делом сгоревшей женщины. Им предстоит выяснить, было ли это самопроизвольным возгоранием или же чем-то другим.

Пару, отметившую 8 лет совместной жизни, убивают ножом на стоянке. При изучении места преступления внезапно начинается дождь, большинство улик портится или исчезает. Чуть позже в угнанной машине жертв обнаруживается ещё один труп. Почти вся группа Гриссома с ним во главе пытается разгадать загадку. Кэтрин Уиллоус в это время выясняет причины обрушения старого дома, повлекшего смерть трех старушек.

Когда похищен ребёнок из богатой семьи, расследование вскрывает несколько несоответствий в показаниях, данных родителями и членами семьи. Становится ясно, что здесь нечто большее, чем просто похищение.

Гриссом, Уоррик и Сара занимаются расследованием смерти молодого человека, сбитого машиной. Молодой человек, ко всему прочему, оказался глухим. Кэтрин и Ник занимаются расследованием группового убийства в ресторане. Дело осложняется тем, что один из убитых — криминальный авторитет.

Гриссом, Уоррик и Ник занимаются делом погибшего бегуна в парке, которого сначала загрызли, а потом вырезали печень и другие внутренние органы. Сара и Кэтрин берут на себя дело утонувшей в парке развлечений девочки.

Полицейские останавливают на дороге автомобиль с двумя полуголыми девицами. В багажнике автомобиля отрубленная голова мужчины. Делом занимаются Гриссом и Кэтрин. Ник и Сара расследуют дело о большом расчленённом теле, найденном в пустыне. Уоррик Браун самостоятельно берёт на себя убийство в подростковой колонии, где встречает старого знакомого.

Команде CSI под руководством Гила Гриссома придётся столкнуться с маньяком. Дело осложняется вмешательством ФБР и отстранением Гриссома не только от дела.

В своём доме обнаруживается Тони Браун, погибший от передозировки наркотиков. Однако Гриссом и Сара весьма быстро обнаруживают, что не столько передозировка была виновата, сколько удушение. Раскручивая ниточку, команда CSI понемногу выходит на настоящих преступников и выясняет настоящую причину убийства.

Пейдж Райкофф, студентка, собралась съехать из студенческого общежития, вызвала такси и… так к нему не вышла. В общежитии её тоже не нашли. Команде CSI предстоит разобраться, что это — похищение, убийство или просто несчастный случай.

Гриссом, Уоррик и Сара расследуют дело об упавшем с верхнего этажа строящейся новой тюрьмы рабочего. Кэтрин и Ник берут на себя дело о четырнадцатилетнем пареньке, страдающем эпилепсией, умершим в доме психиатра.

В школе убит старшеклассник. Гриссом, Кэтрин и Уоррик выясняют, что в мужском туалете, где и было совершено убийство, присутствует запах женских духов. Ник и Сара в это время занимаются весьма вонючей находкой, названной «жидким человеком».

Молодая пара решила снять комнату, но когда они вошли в неё, обнаружили, что она вся забрызгана кровью. Гриссом, Уоррик и Сара начинают заниматься этим делом. Они быстро находят человека, чьей кровью забрызгана комната и, кажется, что дело можно закрывать, однако Гриссом не успокаивается, особенно когда находит жука, питающегося человеческим мясом. Ник и Кэтрин в это время занимаются трупом аквалангиста, обнаруженного при пожаре, висящего на дереве.

Полицейский обнаруживает человека, пытающегося закопать труп. Ни на какие вопросы задержанный не отвечает, но это не останавливает криминалистов. Все улики показывают на подозреваемого, но Гриссом, после беседы со священником, не уверен в том, что задержанный и есть убийца. Однако молчание подозреваемого и хорошее скрытие улик его брата, недавно вышедшего из тюрьмы, делает невозможным доказательство непричастности подозреваемого именно к убийству. Кэтрин и Уоррик в это время расследуют дело найденной в сауне мёртвой девушки.

Женщина найдена мёртвой в запертой комнате. Другая женщина погибла в автомобиле, попавшем под поезд.

В песочнице найдена мёртвая женщина. Расследование выводит криминалистов в дом мадам Хизер, которая предоставляет своим клиентам весьма специфические услуги. Сара и Уоррик в это время расследуют вооружённое ограбление.

Грисом и Кэтрин, занимаясь двумя, на первый взгляд, разными делами, весьма быстро объединяют усилия, чтобы найти старую знакомую — Темми Фэлтон.

Пока Гриссом и Кэтрин участвуют каждый на своём семинаре, Уоррик, Сара и Ник распутывают дело об убитом мошеннике возле казино. Неожиданно в дело впутывается дочь Джима Брасса — Элли.

В лифте найден мужчина без сознания. В госпитале он умирает, а его органы уходят на трансплантацию. Эта история заинтересовывает криминалистов, потому как они обнаруживают, что мужчину долгое время травили тяжёлыми металлами.

Гриссом, Сара и Уоррик расследуют двойное убийство найденных на дорожной строительной площадке двух женщин. Кэтрин и Ник в это время занимаются делом найденного в лесу в сезон охоты на оленей человека, убитого выстрелом в живот.

Команда Гриссома вновь сталкивается с серийным убийцей Полом Миландером. На этот раз Гриссом вплотную контактирует с преступником, выдающим себя за судью Мэйсона и примерного семьянина. В этом эпизоде раскрывается секрет Пола Миландера.

Мужчина снимает со своего счёта миллион и попадает к криминалистам. Однако за недостаточностью улик и за неимением обвинения его приходится отпустить. Кэтрин стремится попасть на спектакль дочери, а в результате становится заложницей похитителя вместе с подозреваемым.

Вся команда CSI расследует дело о внезапно появившемся на «ферме трупов» незарегистрированном мёртвом мужчине. Он умер от пулевого ранения, но доктор Роббинс и Гриссом не могут её найти. Вместо этого они нашли кусочки говядины в ране. Команда связывает эту смерть с поджогом дома убитого.

Гриссом, Сара и Кэтрин расследуют дело о смерти во время любительской игры в хоккей, а Уоррик и Ник занимаются делом мёртвого музыканта, умершего от передозировки наркотиков.

Гриссом, Ник и Сара расследуют убийство четырёх буддийских монахов в буддийском храме. Первый подозреваемый — пятый монах. Кэтрин и Уоррик поднимают из архива дело многолетней давности об убийстве танцовщицы, подруги Кэтрин. Вёл то дело наставник Кэтрин.

Рейсовый автобус в Лас-Вегас внезапно сходит с шоссе, в результате чего несколько пассажиров погибают, а все остальные ранены. Команда Гриссома подозревает, что это не просто несчастный случай.

Расследуя дело о мёртвой девушке, найденной в собственном богатом доме, криминалисты находят, что над ней кто-то установил тотальный контроль, кто-то следил за ней днём и ночью. Расследование вывело команду Гриссома к человеку, устанавливающему спутниковые антенны, и который предпочёл жить на чердаке. По записям, найденным в доме преступника, Гриссом и его команда вычисляют следующую жертву преступника. Это Ник Стокс.

В своём доме найдена убитой 80-летняя женщина, чей труп обгладывали несколько десятков кошек. Расследование этого дела берут на себя Гриссом, Кэтрин и Уоррик. В это время Ник и Сара, при помощи детектива Брасса расследуют взрыв автомобиля. Сначала кажется, что это покушение на хозяйку автомобиля…

В парке нашли труп мужчины, обсыпанного щёлочью. Этим делом начинают заниматься Гриссом и Сара. Нику же предстоит выяснить, каким образом посреди пустыни смогла утонуть женщина.

Команда криминалистов начинает расследовать дело об убийстве после вечеринки бывшего шефа полиции. К тому же его жену и дочь, похоже, похитили. И следы ведут в Майами. Гриссом отправляет туда Кэтрин и Уоррика, где они знакомятся с местной командой криминалистов во главе с Горацио Кейном. Эпизод является пилотом к сериалу C.S.I.: Место преступления Майами.

Тело женщины найдено в магазинной тележке под мостом в районе, где обитают бездомные. Её опознали как Эшли Джеймс, модель, лицо которой можно увидеть во всём Лас-Вегасе на рекламных щитах и обложках журналов.

Catherine and Nick become absorbed in the dangerous world of street racing after one of the illegal sport's hotshot drivers is found dead out in the desert at an abandoned airstrip. Back in town, Grissom and his crew probe the sudden death of a renowned poker player who suffered a violent convulsion in the middle of a high-stakes game with three others. It looks like natural causes, at first, but Grissom suspects foul play.

Grissom and his crew are called in to investigate the death of a young woman found in the hotel room of popular actor Tom Haviland. Haviland admits that he slept with her, but denies killing her. Grissom believes otherwise, however, after finding blood evidence on the celebrity. Then things get personal when Haviland's lawyer hires Grissom's former mentor, Philip Gerard, to find mistakes in the forensic part of the case. And, unfortunately for Grissom, Gerard finds plenty of errors to exploit.

Grissom and Catherine investigate the murder of a wealthy couple who are discovered just outside of their glamorous Las Vegas house, which was up for sale. Meanwhile, Sara probes the death of a cheerleader who is found eviscerated on a soccer field, her organs having been ingested by her killer.

Grissom suspects murder, not suicide, when the body of a dwarf is found hanging from a rope high above a stage in a casino hotel where a convention of little people is being held. Across town, Catherine is attacked at a crime scene where a man was murdered during what appears to have been a home robbery.

Grissom investigates when a woman vanishes while taking part in a magician's act. The female volunteer is placed inside the Amazing Zephyr's "Chamber of Doom" and the illusionist thrusts swords through the box. When it's opened, she's gone---and doesn't reappear in her seat as she's supposed to. Only traces of blood are left inside the chamber. Clues lead the CSIs to an eerie, decrepit mansion filled with secrets. Elsewhere, a rock star's death on a band bus appears to be the result of an overdose, but Catherine uncovers evidence that points to murder.

Fifteen years ago, Catherine helped put John Mathers on death row for the rape and murder of a coed at a nearby college. Her body was dumped in a trash bag, and two other girls found the same way were also linked to the suspect. As the episode opens, Mathers is about to be executed when he's granted a stay based on new DNA evidence. But while Catherine awaits the results of tests on hair samples found on the first victim, another girl at the same school is murdered... and discarded just like the first three - meaning the wrong man could be behind bars.

A middleweight boxing champ dies in the ring after taking a brutal beating from his nemesis, but Grissom finds evidence that points to murder. Outside, in a nearby parking lot, Catherine works a crime scene where a Los Angeles gang member was gunned down, apparently by a rival gang. Also, Nick investigates a jewelry-store robbery.

Catherine called in by a pornographic-film developer to view graphic footage from a snuff movie in which a woman is brutally slain. But the clues are scant: The murderer isn't clearly seen, the cheap-looking hotel room could be almost anywhere and the film was sent to the developer anonymously. Outside of town, Grissom investigates another killing when a body, smothered with fire ants, is found stuffed inside a large toolbox. The initial findings indicate that the person died well over a year earlier.

Distracted by an attractive passenger, an Indian taxi driver feels his cab strike something at a suburban intersection. When he gets out to check, he finds a teenage boy pinned beneath the left rear tire, apparently killed on impact. The cabbie jumps back into the taxi to call for help, but a mob of angry onlookers - all of them white - drags him out and beats him for the crime. When Grissom arrives on the scene, he discovers that the teen has been eviscerated and has stab wounds, but shows no signs of having been struck by the cab.

Grissom, Warrick, and Nick investigate the case of man who apparently was murdered and pushed off a six story building. Grissom's involvement is cut short by renewed hearing problems. Catherine looks into the murder of man outside of his regular bar.

Grissom and Catherine investigate the grisly meat grinder murder at a slaughterhouse. Warrick and Sara look into the apparent suicide of a troubled young woman.

Some bird watchers find a raven with a human eyeball in its beak. This eventually leads our CSIs to a divorced man and his 2 children but not much else. Warrick and Grissom look into the circumstances of David's unusual and first autopsy. This takes them to a car dealership where the man worked.

Warrick investigates the drive by murder of a young girl in his old neighborhood. The girl's father is a friend and mentor of Warrick's as well. Warrick struggles to control his emotions to the point where Grissom pulls him off of the case. Nick tackles the murder of a computer company employee. The only supects are the three other employees in the building.

Catherine takes the point in the investigation of an escalating series of peeping tom incidents. The crew is racing to stop the attacker before his crimes become more serious assaults. Meanwhile, Sara reopens the dormant case of her friend, a district attorney. The DA is facing surgery to remove a bullet she got in an attack that killed her husband three years prior.

Grissom investigates the murder of two men that leads him to a new encounter with Lady Heather. Catherine is desperate to find out what lead to the near death of her daughter and why her ex, Eddie, disappeared.

A man driving with a wooden stake in his head dies in front of a casino. Grissom and Nick work to discover the 'vampire' killer. Warrick and Catherine hunt for the killer of a NBA star's 5 year old son.

An elderly woman crashes her car into a crowded restaurant. One of the patrons is Sara's paramedic boyfriend. Grissom and Nick investigate the possible carbon monoxide murder of a woman in her home.

Catherine, Nick, and Sara investigate a seemingly months old body found in the mountains. Discovery of the man's identity lead the team to the world of robot wars. Warrick and Grissom look into the case of a man found murdered in an alley. Complicating their efforts, the medical examiner ""lost"" the body for 11 days. Greg helps this case by doing some undercover work.

Grissom and Catherine investigate a movie-goer who was stabbed to death; the team comes to a forensic impasse while processing a teenager who died from a gunshot wound.

Grissom and Catherine investigate the murder of a despised comic who died onstage, apparently after drinking from a tainted bottle of water. The case grows more puzzling when a 15-year-old boy dies in a convenience store after drinking the same brand of water. Brass reopens a woman's accidental-death case after spotting the deceased's husband in a flashy new car with a trophy date on his arm.

A murder aboard a luxurious 747 and the discovery of two formally attired teens in the desert confound Grissom and his crew in this absorbing episode. First, a horse trainer is found dead in the cargo bay of a private jet carrying 12 well-heeled passengers and a million-dollar show horse. Initially, it appears the victim was trampled to death, but Grissom and Catherine uncover evidence of foul play. Meanwhile, in the Hell's Gate section of Death Valley, Sara and Warrick probe the apparent suicide of a 15-year-old boy found under a bedspread. The investigation intensifies when a girl's body turns up a half-mile away.

A woman's body is discovered in a small press box at a high-school football field, apparently the victim of strangulation. The evidence leads investigators to two convicts, one of whom is still in prison. At the crime lab, an explosion destroys key evidence and leaves Greg and Sara injured.

Things get personal for the CSIs in the top-rated series' third-season finale, which explores the intersection of the investigators' work and their personal lives. Three masked bandits steal a safe-deposit box from a Las Vegas bank in a daring daytime heist, during which Det. Lockwood is killed. Lockwood's death provides Grissom and his crew with added incentive to find the murderous culprits. But the case really hits home for Catherine when the evidence leads to casino owner Sam Braun, who is like a father to her. Also, Grissom's hearing gets progressively worse and he seeks out Dr. Robbins for help.

Two couples meet in a bar and one of the couples is murdered. When a second couple is murdered in a similar fashion the team suspects a pair of serial killers are on the loose. The case is complicated by leaks to the press and a judge reluctant to issue a warrant. Catherine gets some troubling news about her father's murder trial.

When the lead suspects in Grissom's serial killer case are murdered, Grissom suspects an inside job. Grissom and Brass are at odds when Grissom suggests it was a cop. Catherine and Sara investigate what happened to a college football fan when his bloated body is found in a bathtub.

Grissom and Warrick get the case of an old woman found mummified in her closet. Sarah and Nick arrive to investigate a breaking and entering to find a raped teen. These cases are not as disparate as they first seem. Catherine looks into a gun found by a boy. The gun is connected to a week old murder across town that Warrick caught.

During Vegas's latest Heat wave of triple digit temperatures, Gil and Catherine investigate a baby locked in a car. Warrick investigates a man dead of an apparent heat stroke in his house. Nick and Sarah investigate a woman's body found floating in the lake with a blow to the head.

The team is introduced to the ""Furry"" side of Vegas when a man is found dead on the side of the road, dressed in a racoon suit. Elsewhere in Vegas, a gunshot victim is found in a deep-freezer, frozen solid.

A severed head is shipped to Dr. Robbins from Jackpot, Nevada. Grissom goes to Jackpot to find the rest of the body and gets very little cooperation from the locals. Catherine gets an unexpected gift from her father.

Warrick's appearance at the preliminary hearing on a rape and murder case goes terribly wrong when the only piece of evidence is thrown out on a technicality. Grissom and the team have 24 hours to make the case with new evidence or the killer will go free.

A suspect's infatuation with Catherine results in her taking over a high profile case. The case is a missing woman who aspired to be a showgirl. Sara and Nick are angered since it takes the career making case away from them.

The sheriff is under political pressure to find who killed an air marshall with a car bomb that the sheriff witnessed. Grissom, Catherine and Nick are pressured to produce results. Warrick and Sarah try to find the murderer of the wife of a singer who headlines on the strip.

A teenager is found murdered on a construction site. Grissom, Sarah, and Warrick follow the lead of blood on a hammer. Nick, with an assist from Catherine, tries to find how a woman was killed by a gunshot on her lawn when no one nearby had a gun.

The lone holdout on a jury is found dead in the jury room. The eleven jurors who were voting guilty and who hated the dead juror are the natural suspects. Nick reopens a four year old case when the sister of the victim comes forward with new evidence.

A woman found murdered in her home. Her resemblance to Sara causes Grissom to take a personal interest in the case and forces him to examine the decisions he has made in his life.

Three little CSIs (Grissom, Sara, and Nick)respond to an electrocution at a casino. The casino is hosting Japanese antiquities. The electroctution is just a ruse to steal the central piece of the exhibit. Catherine and Warrick deal with a vampire murder.

A robbery at a grocery store results in a shootout leaving five dead. The police officer at the scene believes Grissom has a grudge against him. The entire team has to process the enormous amount of evidence at the scene.

The whole team must investigate a crime where a husband and his porn star wife were murdered execution style. Things get personal for Catherine when Grissom talks to her about her evaluation. Brass believes that Sara may have some type of problem.

Catherine and Sara deal with the death of what at first seems to be a transvestite. Later during autopsy they find out that the make-up he seemed to be wearing was actually facepaint, he was a clown. Grissom, Nick, and Warrick deal with the death of a man in a homeless area. They found out he worked in a recovery center for drug users.

A mutilated female body is discovered tied to the undercarriage of a bus carrying prisoners from a women's correctional facility after a severed arm flies out from beneath the vehicle and strikes a car. Catherine leads the investigation and at first believes the woman was escaping, but the evidence increasingly points to murder. Back in town, Warrick probes the death of a gambler who was stabbed multiple times in his brother's kitchen.

A violent murder in a casino parking garage and another episode in the police interview room lead the CSIs to one shocking discovery after another. The case involves a missing woman, a long dead body and a missing child.

Warrick, Catherine, and Nick try to determine the cause of a house fire that kills a teenage kill. The fire is in the same neighborhood as a similar arson fire. Grissom and Sara investigate a man found dead with letter tiles in his stomach. The man was a competitor in a word game tournament.

Grissom, Catherine and Nick investigate the death of a runner during a competition. Meanwhile Sara and Warrick investigate the death of couple in a hotel room, initially thought to be a murder-suicide. Both cases take place during this 'cop' competition , with more than 20.000 attendants (all of them cops). This gives the investigations an interesting turn, as almost all the suspects and all dead people are cops.

A roller coaster runs off track leaving 6 people dead. The CSI team must uncover whether this was an accident, or foul play. Warrick and Catherine try to find the killer of a 13 year old girl.

Two men are found murdered after scamming Sam Braun's casinos. Grissom and Warrick investigate after Catherine is thrown off the case. One of the suspects is the son of a man Braun caught cheating. Nick gets the promotion that Sara coveted.

A casino employee is beaten and raped on her way home from work, but she survives and identifies her attacker. Unfortunately, a DNA test sets him free and Grissom must wrestle with whether evidence can ever lie. Later, Grissom comes to the rescue of a coworker who ends up on the other side of the law

A wild night in Las Vegas has the CSIs simultaneously investigating four fatalities. Greg Sanders' first day in the field has him assisting Grissom's investigation of a fatal nightclub shooting. Meanwhile, Catherine probes into the death of a stripper found dead in a hotel room, while Sara and Nick look into the strange case of an "alien" body found near Area 51.

Heavy rains in Vegas wash up a body in the storm drains. As the team investigates, they find bones from another murder.

A child is abducted. As the Amber Alert goes out, the entire team investigates in a race against time. Lindsay Willows is found hitchiking to the alarm of Catherine.

A woman is found dead in a hotel suite with symptoms of the ebola virus. Another woman is found dead with similar symptoms. Catherine and Nick investigate. Sara and Greg with help from Grissom try to determine how a the owner of a home was killed. His home was tented for infestation.

Grissom and Sara investigate the murder of a woman after a swap party. The married couples in the neighborhood meet and switch partners. With the help of a crime scene cleaner, Nick and Warrick find there was more to their crime scene than they first thought. Catherine wants a promotion to day shift supervisor.

The killer from The Execution of Catherine Willows returns with deadly results. The entire team is engaged in a race against time to stop this sadistic killer from succeeding again. Grissom is additionally distraught by the idea that this killer is smarter than he is.

Grissom is called to a murder of a 17-year-old in a casino penthouse. Sophia Curtis (Louise Lombard) joins him in his research, she normally works in the day-shift. The entire team gets involved when its discovered that a kiddnapping took place along with the murder.

A woman who was pulled over by police is found murdered two miles up the road from the stop. It's not long before Robbins determines that the woman is, genetically speaking, not a woman.

Grissom is confronted with new evidence while on the stand of a murder trial of a restaurant owner. This development requires the reopening of the case and Eckley initiates an inquiry into Grissom and his team. The results of the inquiry lead to dramatic changes of the CSI team and the series.

Grissom and his team investigate the starving death of a five year old boy. They discover the boy has siblings who are in danger too. Catherine and her team determine who killed a prisoner in a holding cell brawl.

Greg, for his final proficiency, has to determine how the Sherlock Holmes of a Sherlock Holmes club was killed. Nick and Warrick try to determine how the driver of jeep was killed when the car ran off the road. They have to do this under budget while Catherine is watched by Ecklie.

The swing shift has a busy time. Warrick looks into the murder of man by someone who apparently needs a wheelchair. Nick looks into the murder of woman in the subculture of the narcocorrido, songs about drug murders. The night shift is slow and lends help to Catherine's team.

Catherine, Warrick and Nick find the body of two women at a construction site buried under tar. The swing shift are brought into the world of foreign "mail-order" brides. Sara and Catherine have a dispute in which Sara gets suspended by Ecklie for acting insubordinately towards Catherine and himself. Sara opens up to Grissom about her childhood past.

Grissom, Sofia, Sara and Greg investigate the disappearance of a woman coming home from a night out with a friend, her abandoned car found on the edge of a highway. Catherine, Warrick and Nick investigate the deaths of a hunter and his prey, a Kodiak bear.

When a major Las Vegas player is found dead, Ecklie orders both teams to investigate the case. The man who had secrets on everyone in Vegas had a very big one of his own.

Catherine, Nick, and Warrick investigate a badly mutilated body in the woods. The cause of death was a shotgun blast. Nearby is a beaver dam made in part with cash. Grissom, Sarah, and Nick try to determine how a man was killed in a hotel room. It leads them to a convention of big women.

A serial killer strikes again, and the CSI team tries new technology using evidence from a prior killing. They find a fingerprint belonging to Jesse Acheson, who becomes the prime suspect. A boy confesses to the killing of his brother, but evidence suggests that he may not have committed the crime.

Grissom, Sara, and Nick investigate a wildfire that killed one man and badly burned a woman. Catherine, Nick, and Warrick get the case of a family of three murdered in their home.

One night, four cases. Grissom and Brass get a stolen hummer and a taco stand. Warrick gets a dead car show girl. Sara and Greg get a dead bodybuilder. Nick gets a dead boy found on a bench.

Brass travels to Hollywood, California to try to track down his estranged daughter's friend, meanwhile trying to rekindle some kind of relationship with her.

Grissom and Sara investigate the murder of a mental-hospital patient and quickly narrow down the suspects to a handful of other patients and staff members.

A man (Alan Rosenberg) whom Catherine flirted with at a bar reappears in her life as a suspect in a murder investigation.

Two amorous freshmen are found dead on a sleeping bag in a dorm room, and Sara and Greg run into one dead end after another as they try to determine why the students were killed. Warrick, Nick and Catherine figure out how a man is found dead in the center of a crop circle. Ecklie is called into duty for a man found dead in his car and his body later goes missing.

The CSI teams come together to save one of their own when they learn one team member has been kidnapped and buried alive, and now they must find him before he suffocates under five feet of dirt.

The CSI teams come together to save one of their own when they learn one team member has been kidnapped and buried alive, and now they must find him before he suffocates under five feet of dirt.

The two forensic teams come back together under the leadership of Grissom and Catherine just in time to tackle three separate investigations: a murdered couple found in bed in a suspicious trailer explosion; a beautiful stripper discovered dead and dumped in the worst part of town; and two bodies found baked and decomposed after spending five days in the trunk of a car exposed to the hot Vegas sun, forcing the CSIs to ""wrap"" up the evidence and bring it back to the lab for further analysis.

An up-and-coming movie star is found dead in his hotel room after a night of partying with his groupies.

The CSIs investigate a man's claim that his wife fell down a set of stairs in their home.

The CSIs come across an abandoned military compound being used by a small cult. The CSIs grow suspicious when they see that a mass suicide has taken place, but only 11 of the 12 beds are occupied.

Nick takes the lead on a case where in the house a family of four, three pools of blood are found. Nick thinks that the little girl may still be alive, but Sara is doubtful, thinking that Nick's recent near-death experience is affecting his judgement.

A 28 year-old single mother is found dead. Initially, it's believed to be a suicide, but Catherine determines she was murdered. Also, Ecklie summons Grissom to refute the testimony of an entomologist in a murder trial.

The team must investigate the death of a police officer who died during a shootout leaving hundreds of bullets on the crime scene. The case becomes complicated when it turns out that Sofia Curtis and Jim Brass were with the victims during the shootout. When it turns out the officer died from friendly fire, it is up to the team to find out who fired the fatal shot. Meanwhile, Sofia is wondering whether she fired the fatal shot or not. She decides to hide the fact that the officer stepped into her line of fire, afraid it will ruin her career.

The CSIs sift through the overwhelming evidence from a shootout with drug dealers in order to determine who is responsible for the death of a police officer killed during the incident.

Catherine and Brass investigate the case in which a man is found dead in a dumpster. It soon turns out the man had a serious food problem. The trail of his death soon leads to a hotdog-eating contest.Meanwhile, Nick and Sara investigate a not-so-amicable divorce with a bizarre twist. So bizarre it eventually lead to murder when both are found dead and it looks like the dog killed one of them.

The CSI's are called out to investigate the disappearance of a boy whose father died four years ago. Soon a couple is arrested at a convenience store with a boy matching the description of the missing kid. The only problem is they both claim it is their son. Both parents have exactly the same picture of the boy, with a scar on exactly the same place on his face. They hope a DNA-test could confirm who the real parents are, but when this information comes to light, it lead to another bizarre twist, possibly murder.

The CSI team investigates the murder of a man suffering from a congenital hypertrichosis, causing him to grow excessive body hair. Elements of the case suggest a connection with a belief in werewolves. The case leads to the victim's sister, who suffers from the same disease. Because of her condition, she'd been hiding from the world, but it turns out that she's hiding facts that are vital to solving the case.

The CSIs investigate the stabbing of a motocross racer who was about to leave town with a young woman he had been living with. Also, Nick comes closer to finding the truth about his kidnapping.

The CSIs crash an elegant party for the city's crème of the crème to discover who killed a young man. The case gets a bit more personal for Catherine when her father, Sam Braun, is one of the suspects.

The CSIs must investigate when a party girl is injured and killed in a traffic accident.

The CSIs investigate the gruesome murder of Lady Heather's estranged daughter, Zoe, who was found in the middle of the Vegas desert.

The investigation into a body found in a chimney leads the CSIs to re-open an investigation of an unsolved homicide of a female teenager named Caroline Fitzgibbons.

The CSIs become the focus of a reality TV series, which follows them while they investigate a serial rapist, who recently gained access to a woman's apartment by posing as a fireman. Also, Warrick's work on the late-shift is causing problems with his marriage to Tina.

When a student is arrested and tried for the murder of a popular high-school girl, the suspect's 12-year-old sister confesses to the crime. This results in the judge giving the prosecution 72 hours to re-examine the evidence before the jury delivers its verdict.

The team investigates the death of a psychic who "saw" her own death while performing a reading for two other women. Greg reveals a family secret to Grissom but Grissom believes that science will be what solves the case.

The CSI team is lead into the rap music world as they investigate the murders of three rival teen rappers.

A wealthy defense attorney is killed at her son’s wedding but Nick’s car, containing all the collected evidence is stolen and the case is compromised. After discovering new evidence, the team suspects that someone from the wedding party may be responsible for the murder.

A high roller who spent the night with a woman he had just met is found dead on the loading dock of the casino where he was staying. The investigation reveals that the victim won $10,000 in a pool game and was an assistant to a respected movie producer.

A man accused of murdering his wife and co-workers leads the CSIs on a wild ride through a busy casino, eventually barricading himself and a hostage in a casino hotel room. The CSIs process the evidence from the crime scene to determine whether or not the man acted alone or had an accomplice. One of the CSIs eventually steps in as a hostage negotiator, putting himself in danger.

In the season finale, the CSIs wait by the bedside of one of their own when he's shot in the line of duty. One CSI faces a hard choice by having the power of attorney over their injured friend and colleague. Meanwhile, the team also investigates the strange way of life of one man when he is found decapitated by a train.

In part one of this two-part seventh season opener Grissom and Catherine handle the case of a women's dead body found at Cirque du Soleil by a performer. Meanwhile, an investor at one of Sam Braun's new casinos is shot to death during a party on the rooftop. Catherine's life is in jeopardy after visiting a nightclub with Nick. Grissom finds a miniature replica of a crime scene that he is investigating.

In the second part of this two-parter Grissom investigates the murder of an aging rockstar who is found dead in his kitchen with an exact replica of the crime scene on the counter next to him. Meanwhile, Catherine probes her own abduction and learns that someone may be targeting her family.

Coming straight from the perspectives of five people: Donna, Rebecca, Jack, Lou and Ray. All with one thing in common. They’re all dead. Brass and Catherine get to handle the case of Donna, who’s a cop from San Francisco, moonlighting as a bodyguard. Warrick and Greg work the case of Rebecca, who’s a former supermodel who died while hiking with her new husband Gavin. Nick and Sofia handle the case of Jack, a returning veteran from Iraq, who was killed in front of his wife and baby daughter who he just met for the first time. Grissom and Sara take the case of Lou and Ray whose bodies were found in Lou’s garage.

Three tourists are beat up, badly. One is dead, Alfonzo. Jessica is badly beaten but is still alive. Stanley, the last tourist is saved by Greg who ends up severely hurt in turn and ends up hospitalized after having to make a life altering decision.

Grissom and Sara may be secret lovers, but they still find ways to surprise each other like when their religious beliefs surface when two nuns find a body of a woman crucified on a makeshift cross. The woman was found in a church where the priest may be a man of sin instead of a man of God.

Grissom attempts to get a confession from a neighborhood pedophile by having him help in locating two missing boys. The sex offender is the main suspect. The investigation is more complex than the team ever thought it would be.

While investigating an elderly woman's murder, Grissom receives a miniature crime scene replica; Greg attends a hearing to ascertain his culpability in a teenager's accidental death.

Identical twins are found murdered on the same night. The CSI’s investigate the two separate murders only to find a twist in the investigation find that leads them in another new direction.

The Cadillac of an infamous 1970’s mob boss turns up in a lake, even though he disappeared years ago. A photo of current murder victims also turns up in the car, so the team must determine whether this current murder spree is related to the missing gangster.

Grissom investigates when a worker at a poultry processing plant is found dead in a stun bath used to electrocute chickens before they are slaughtered. Nearby, a miniature replica of the crime scene is discovered. It's eerily similar to two other replicas left at scenes of homicides. Also, a man and a dead woman are found stuck in cement at a construction site; and an elderly Russian woman is discovered dead in her apartment with her head in a gas stove, but Warrick thinks she was murdered.

Catherine testifies in a murder trial in which a man is accused of murdering his own mother three years ago, but the suspect is found not guilty. Catherine, however, believes he did commit the crime and that he may also have killed two other people, so she sets out to find the other victims. Grissom prepares to leave on a four-week sabbatical.

The team has a hard time trying to understand Michael who has become a team member since Grissom’s teaching hiatus. They investigate the murder of an unidentified girl who may have been killed by a serial killer who has been killing since the early 1970’s.

At Keppler's request Catherine uses a different approach to catch the killer, and in doing so she deceives the rest of the CSI team. The team soon discovers that something is amiss in Catherine’s investigation.

Nick and Keppler investigate the bizarre world of the black market sales of body parts after they find a body that has been burned and the organs removed. The rest of the CSI team investigates the death of rich woman who was killed in her own home.

Grissom returns from his sabbatical; Keppler is put into a compromising position when the bodies of a Trenton police officer and a hooker are found in a hotel room. The man who found them is a retired New Jersey cop and close friend to Keppler, who doesn't reveal their relationship.

Once he unseals a package sent to him through the mail, Grissom is floored when he finds a miniature crime scene inside. The finding is entirely more perplexing since the successive killer accountable for earlier related miniature crimes is now deceased. Grissom plows to examine the miniature and discover the actual location, when the investigation makes it clear the murder showed has yet to happen, but is probably going to happen soon.

Grissom and his team are discouraged when they find a pool of blood as they begin investigating the disappearance of a high school basketball star and his cheerleader girlfriend.Grissom's quip that the young lovers may have run off to Mexico is soon quashed by the discovery of drops of blood by Ryan's vacant parking spot at the school. After finding a letterman jacket and cheerleading sweater in the field house and a pool of Ryan's blood nearby, the team tries to determine what went awry.

The terrified eyes and cryptic words of a murder victim haunt Sara while she processes the house where several showgirls were killed.

After a man is killed in his limousine, Greg finds that the murder victim has ties to the man he had to kill in self-defense. The team finds that the brother is involved in this investigation and has to deal with him and his hostile mother.

The CSI labrats take center stage to discuss the case of the Miniature Killer.

When a has-been boxer is killed, the CSIs must establish which of several life-threatening acts actually killed him.

Several suspects in a murder case are UFO-club members who believe shape-shifting aliens have been working to conquer the human race for centuries

Grissom investigates when a sadistic client tries to murder Lady Heather (Melinda Clarke), who makes the probe more difficult when she refuses to name her attacker. Also, Grissom's reunion with Lady Heather makes Sara uneasy.

As the CSI's continue their search for and discover the identity of the "Miniature Killer", Grissom and Sara's relationship gets exposed to the rest of the team as she goes missing during the investigation. The "Miniature Killer" is finally captured, but not before a member of CSI becomes the killer's final victim.

With time, the weather, and the desert against them, the CSI team must work together to find Sara before she dies from the miniature killer's attack.

The CSI team investigates two unusual cases, one involving the suspicious death of a go-cart racer who took his hobby to the highway and paid the price with his life, and a murder at a hip new restaurant where patrons dine in the dark

The team investigates a girl whose whole family had been killed and she is supposedly possessed by the devil.

Grissom investigates the mysterious hanging death of a young man whose body looks like that of a female.

Grissom and his team investigate when an actress is killed on the set of a horror porn film.

Grissom and the team join forces with Jack Malone, an FBI Agent from New York to track a serial killer.

The crossover continues on Without A Trace S06E06 Where & Why (II).

Sara questions her future as a CSI when a past case comes back to haunt her, the 12 year old Hannah, who has to back up her brother one more time with all new tricks up her sleeves.

Hodges stages hypothetical murders in the lab in order to give his fellow lab techs a chance to play CSI, but unbenownst to them he has other motives behind his actions. Meanwhile, after Sara's farewell, everyone tries to comfort Grissom.

The team investigates an underground mob. Warrick ends up becoming the prime suspect in a murder that's related to the mob, and his addiction to pills starts to have a significant impact on his job as a CSI.

The world of illegal dog fighting is explored by Grissom and the rest of the team when they take on the case of a wealthy socialite who was murdered. Meanwhile, Warrick struggles to clear his name in the recent exotic dancer murder case.

Two murders that happen during Las Vegas' annual bull riding rodeo are investigated by the CSIs, who find that the murders might be connected to illegal bull breeding.

Grissom and his team battle the flu when they are called upon by D.D.A. Klein to investigate the deaths of several key witnesses for a grand jury case against a dangerous Las Vegas gang.

CSI investigates the death of a little girl whose identity remains unknown.

Brass, Catherine, Grissom and Nick work the case of a female victim found in an apartment building with a gun shot wound. Drops becomes a person of interest during the investigation, even though he is still in jail.

A deer is illegally killed, and the person found with the body in the back of his truck apparently dressed it in a tutu. The man, who was completely drunk when arrested, was being interrogated by Nick and Brass, and suddently tries to escape and is pepper sprayed. Unfazed by the spray, officers then taser him and he bursts into flames and dies. Meanwhile an unbalanced woman wearing a tinfoil outfit at the front desk tries to warn people (including Nick) of an alien invasion. After observing the burning man, she later turns up dead with green-tinted blood. When other people turn up with the same problem, it's up to the team to figure out why. Meanwhile, an old couple dies, apparently in their sleep... but there is evidence the cases are related.

Grissom, Catherine, Nick, Greg and Brass are investigating the death of a well known TV star called Annabelle.

Catherine comforts Warrick when he is accused of murdering a famous Vegas gangster and even he is uncertain of his guilt or innocence.

After Warrick is shot in a Las Vegas alley, the CSI team comes together to deal with the aftermath.

A hypnotist bank robber becomes the prime suspect in a murder investigation.

After several victims are found dead while performing normal, everyday activities, the CSIs must find the reason as to why each of the victims remain upright after dying.

The team investigates the death of a woman who turns out to be the daughter of a wanted criminal.

Grissom asks Lady Heather for help when the team investigates a case connected to the world of domination.

The team has a hard time investigating a shooting in Koreatown when none of the witnesses will talk about the crime.

The murder of a mother and her child seems to be connected to a murder case from 12 years earlier.

A popular young singer is found dead outside an infamous Las Vegas nightclub, leading the CSI team to uncover a link between that crime and a murder 50 years earlier.

When the team discovers a connection between a new murder and a serial killer, Grissom secretly joins the class of a criminal pathologist (Laurence Fishburne) to help crack the case.

The CSI team is shocked and saddened when, after working with Dr. Raymond Langston (Fishburne) on the "Dick & Jane" murders, Grissom announces that his time as a CSI has come to an end and offers Langston a permanent position on the CSI team.

The first day on the job for Dr. Langston turns from bad to worse when a simple burglary case quickly overlaps with a complicated arson and homicide case.

The detectives search for the murderer of FBI agent Billy Ray Jackson, only Billy Ray isn't really an FBI agent, and neither are his impressively capable partners, Miles Baker and Emma Solomon.

Langston and Nick are called to investigate a murder at a fast food restaurant and have quite a task ahead of them when they discover that much of the evidence is coated in cooking oil.

While Langston testifies in the trial of a respected Congressman, new evidence sends the CSIs back to the lab to reopen the investigation.

The CSI are called to three different crime scenes in one night that are seemingly unrelated, but each case's forensic evidence reveals a common link

When the CSIs are called to a murder scene at a familiar motel, Nick is thrown for a loop as he pieces together three separate murder investigations that all took place at the same establishment over the course of a year.

Langston and Riley are taken hostage during the aftermath of a shootout in an usually calm Las Vegas community.

Langston is shocked when his former student is found murdered and becomes the focus of a CSI investigation into the world of Mexican wrestling.

When a seasoned sky diver is paralyzed after free falling to earth when his parachute doesn't deploy, he turns out to be linked to the strange death-by-airborne-toxins of two wealthy men with ties to Iran.

When the producer of the reboot of a classic SF show is murdered at a Las Vegas science-fiction convention attended by both Hodges and Wendy (both, unknown to each other, fans of the original show), they find a connection with each other as the team investigates the crime.

Catherine revisits one of the very first cases she worked as a CSI when the convicted felon in the murder claims the verdict was based on faulty evidence.

A series of indeterminate deaths test the deductive powers of the CSI team, who fear that a public health emergency may be in the offing. Meanwhile, a friendly rivalry over who will win an upcoming bikini contest takes a deadly turn...

A band of vicious bikers is given the go-ahead to take down one of their own when it's discovered that the guy is an undercover cop.

A cache of missing chips from a closed down casino turn up in Vegas and a string of murders follow, leading Langston to use deadly force for the first time in his career as a CSI.

A rising young star is killed in a wreck and her determined stalker claims credit, but the team finds out there's more to this tragedy than meets the eye.

The son of a notorious killer is arrested on suspicion of murder, and the CSI team must overcome their natural prejudices against the boy's antecedents in order to track the true culprit.

The team investigates the murder of Jason, a troubled computer geek working at a low-level casino support industry job who lures a colleague, Paulie, into a dangerous plan to make a working stiff's dream come true.

When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident.

After a beloved college football coach is found dead and his house drenched and spattered with his blood, the CSI team hunts for the killer who didn't find Coach Jimmy lovable at all.

When two seemingly different crimes turn out to be related, the CSIs discover they're interlocking parts of the same revenge plot.

The CSI team helps Ray Langston investigate a prostitution ring that may have harbored a hostage he has been looking for in Miami and New York.

The crossover starts on CSI: Miami S08E07 Bone Voyage (I) and CSI: New York S06E07 Hammer Down (II).

A bowling tournament is disrupted when an important piece of evidence is uncovered, leading the CSIs to investigate a murder at the same bowling alley.

When Nick, Greg and Hodges take Henry to celebrate his birthday at a biker bar, they uncover a double homicide and find several suspects still at the bar who may be the murderers.

The CSIs dig to find the truth about how a recent shootout at a gun store might connect to a young woman who may have committed suicide.

Two secretaries on holiday from Arizona attempt to steal a man's wallet and ATM pin number in a scam, and wind up dead in different locations. Meanwhile, the CSI team also investigates a disturbing medical mystery involving the dumping of human organs in a wildlife refuge.

The CSI investigates the mystifying death of a former pro golfer whose allegiance to the game might have cost him everything.

The case of two high school students, one dead and one missing, lead the CSIs into the underbelly of streetcar racing and a tangled web of deadly competition.

When a band member of Rascal Flatts is electrocuted by his own guitar during a concert, the CSI team investigates if it was a case of foul play.

When a young boy is found murdered, the CSI team uncovers evidence that may link his death to an old case that recently resurfaced.