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

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.

The CSI team investigates a well-orchestrated bombing at the funeral of Officer Franklin Clark

The team investigates when a woman is attacked by a shark in the pool at a Las Vegas casino.

A vampire and werewolf convention becomes the center of a murder investigation.

The CSI team investigates a mad slasher who strikes without leaving a trace -- because he wears a form-fitting black latex suit that leaves not a molecule of evidence behind

The CSI team investigate a murder at the home of Marta, a "level 5 hoarder" whose home is stacked high with possessions and garbage--and more than one dead body

The CSI team investigate the murder of a man whose daughter was killed five years ago, and the bizarre death of a young man who appears to have been killed by a T-Rex.

When shredded remains of a man are discovered, evidence leads to multiple possible suspects.

The CSI's investigate a series of deaths related to an energy company's grotesque cover-up of tainted water.

The sky is falling or at least people are. The CSI's try to figure out if it was murder or sucide after a man is dead after falling from a hotel. Across town, a elderly woman falls through her table and her husband dead in the shower. The only two witnesses to the crime are an incooperative cat and a parrot who pleads the fifth.

The CSIs set out to track down a pedophile suspected of murdering an FBI agent's wife and kidnapping his children.

The CSIs question the validity of an online picture depicting a murdered call girl until they find the same woman strangled to death in the dumpster that appears in the photo.

A body with unusual burn marks is discovered on the side of the road; Greg asks a teacher (Dita von Teese) out on a date.

Sara clashes with her mother-in-law and a woman from Gil's past.

The Crime Scene crew investigates the gruesome murder of a high-powered, widowed lawyer, while Ray faces that it is time to move on from his old life.

Jason McCann contacts Nick and says that he's in imminent danger. Langston has a courtroom war of nerves against serial killer Nate Haskell. A bomb tech disarms a bomb attached to Nick's house. But when he accompanies Nick, Catherine and Vartann to a warehouse with multiple booby-traps per square inch, Kip has to really earn his paycheck to find a safe way out for the CSI team.

The team investigates two apparent corpses who aren't exactly dead at all.

While investigating the murder of a convicted ex-cop, the CSIs stumble upon a list in his prison cell with names of several individuals he believed might have been his wife's true killer.

A string of deaths, including a gamer found dead on his couch and a newly divorced man at the bottom of a pool, instigate a bet among the CSIs as to whether they've "hit for the cycle" - a homicide, a suicide, an accidental and a natural death all in one night

Langston and Sara turn to Lady Heather for help in tracking down the culprit responsible for injuring a woman before she was seemingly mauled to death by a mountain lion. Meanwhile, Nick and Dr. Robbins manage to rescue the unborn baby of a teenage girl who appears to have committed suicide

Following his escape, Nate Haskell, the notorious "Dick & Jane" killer, resurfaces when he e-mails a disturbing video to the father of one of his brides, threatening to take her life.

Langston becomes more determined than ever to track down Nate Haskell, the notorious "Dick & Jane" killer, after discovering that he's kidnapped his ex-wife, Gloria.

After years of pursuit and a countless number of murders, Langston comes face-to-face with serial killer Nate Haskell inside the house where his killing spree began.

D.B. Russell leads the CSI team on a hunt to find Morgan and Ellie Brass following their kidnapping by a ritualistic killer.

The CSI team investigate a murder at a high stakes poker game.

The CSI team investigates a fire at a music venue that leaves four people dead, including two band members.

When contestants on a reality cooking show accidentally eat human flesh during a competition, the CSI team is brought in to investigate.

The team meets a blast from the past, with a chance to solve a cold case that has haunted the team for 14 years.

The CSI team investigates the death of a homeless man who had a huge winning streak at a small casino.

A body is discovered during torrential rain in Vegas; Sanders is accused of framing a man for murder seven years ago.

A dead man is found inside a human-size hamster ball; the team collaborates on a serial rapist investigation.

The CSI team is called in to investigate the stabbing of a couple found at a local motel that is reminiscent of two incidents that occurred in the same room.

A spa weekend for Sara, Finlay and Morgan turns into a murder investigation and missing persons case when Finlay disappears, as the CSI team must piece together what happened in detail to find her.

When a man is found murdered at an elaborate holiday party complete with real snow and live reindeer, the CSI team is brought in to investigate.

An inbound plane’s passengers become the victims of an onboard thief, but when one of the passengers is found dead, the petty crime turns into a murder investigation.

The CSIs are shocked when they discover that a victim in a car crash is someone they are familiar with.

When a woman is found dead in Mexico and a murdered couple is discovered in a driveway, evidence from one investigation could help the other.

Greg and Nick investigate the death of a 16-year-old girl with ties to a brothel.

A murdered Elvis impersonator has a strange connection with a bird.

A murdered groupie and a missing prostitute both have connections to a mysterious band.

The team investigates when a whole family is reported to have been missing for a month.

When a teen opens fire in a police station, Russell is taken hostage.

As the CSIs hunt a cannibalistic killer, they realize there is more than one.

The team investigates the cyber-related murder of a prominent casino owner's wife and receive help from the FBI's Cyber Crime Division.

The CSIs investigate a crime that has ties to a 25-year-old mob heist; Brass is faced with a decision when his daughter tries to commit suicide.

Finlay must deal with a bomb planted in her car. Russell gets a call from someone claiming to be the Gig Harbor killer.

The CSI team investigates a robbery and fatal shooting at a medical marijuana shop.

Sara and Greg are quarantined after responding to a crime scene that’s contaminated with a deadly pathogen.

A chemistry teacher's science experiment goes horribly wrong.

Morgan, Sara and Fin try to relax at a forensics conference when a mass shooting occurs on site.

Frustration mounts for the CSI team as another victim surfaces who is linked to the Gig Harbor Killer.

The CSI team take a look into the death of a woman who has been drinking and taking drugs in a pool at a rehab facility.

The CSI team find themselves taking a look into the kinky world of “rubber dolls” as they investigate the murder of a man stabbed in an alley.

The CSI team investigates a murder at Clark County jail after an inmate stumbles upon a body while running away from officers.

The CSI team investigates the bizarre death of a man who was killed not once, but twice.

The CSIs' investigation of the victim of an apparent hit and run leads them into the world of aeronautics.

The CSI team reopens a 10-year-old murder/suicide case when the sole survivor claims her accused father was innocent.

The CSI team continues their investigation into the kidnappings and murders of young women when they learn their main suspect, Jared Briscoe, is released from jail due to lack of evidence.

The CSI team investigates a homicide at a convention for people who collect macabre murder memorabilia.

The CSI team investigates the murder of a young victim dressed as a superhero.

The CSI team investigates a death involving a vintage Rolls Royce and a chrome-covered victim.

The CSI team investigates a murder with ties to two teenaged kidnapped girls.

The CSI unit faces the final showdown with the Gig Harbor killer whose motives are finally revealed. Meanwhile, Nick Stokes makes a decision that will affect the entire team moving forward.

Grissom and Willows return to help the CSI team solve a catastrophic case that paralyzes all of Las Vegas.