The teams are reunited under the leadership of both Grissom and Catherine as they tackle three complex cases involving a trailer explosion, a stripper found dead in a bad part of town and two decomposing bodies discovered in the trunk of a car.
The CSI team investigate the suspicious demise of a rising young movie star found dead in his hotel room after a night of revelry with some of his groupies.
The CSI team tries to ascertain whether or not foul play was involved in the death of a housewife who fell down a flight of steps.
When the bodies of a small cult are discovered in an abandoned military compound, minus one member, it must be determined whether they committed mass suicide or if they were murdered.
The CSI team searches for evidence to prove that an entire family has been murdered when the victims' bodies cannot be found.
The team question whether or not a young woman's death was really a suicide after they discover evidence that suggests her newborn infant was not her biological child.
In Part One of a two part episode, the CSIs must determine whether a policeman killed while in the midst of a high-speed pursuit was a victim of friendly fire.
The conclusion of a two-part episode in which the CSI team suspects that an officer killed in a shoot-out may have been shot by a fellow officer.
A man found dead in a dumpster leads the CSIs into the world of competitive eating.
A lack of substantial evidence leads Grissom and the team to wonder if a reported kidnapping actually happened.
The CSIs discover unusual evidence in the case of a man who suffered from a condition that caused him to grow excessive body hair, making him look like a werewolf.
The CSI team investigates the stabbing death of a young motocross racer whose body was discovered in his girlfriend's garage.
A former showgirl with ties to the mob throws a party that ends with one of her guests being murdered and Catherine's father as the prime suspect.
The crime is shown from the viewpoint of the killer as the CSIs investigate two deaths that are linked to the same suspect.
The CSIs delve into the bizarre death of a young woman whose body appears to have been used for scientific experimentation.
The team investigates the murder of a man who was stuffed down the chimney of a former suspect's home.
The CSI team is followed around by a reality television crew as they work on a case.
A sister's stunning courtroom confession throws her brother's guilt into question. Blindsided, the CSIs must race to re-examine the case's evidence in order to determine which sibling is telling the truth, but begin to suspect that a more sinister scheme may be at work.
During a "reading" with two young women, the psychic begins to see visions of her own murder instead of information pertaining to her clients. When she is later found dead in her occult shop, it is up to the CSI team to determine her true cause of death.
When three teenagers are killed while promoting a rap album the CSI team has to enter the realm of two rival rappers, each will do whatever it takes to promote themselves and stop the other.
When Nicks car is stolen along with all the evidence from a case, solving the death of a wealthy defense attorney, at her son's wedding, becomes that more difficult. Through further investigation the CSI Team begin to suspect someone in the bridal party.
A fantasy gone bad, the CSI team investigates the death of a young, high roller spending lots of cash living out a fantasy weekend. Upon further investigation the team learns he may have been an unwitting participate in a fantasy created for him. Things take a turn for the worse for the victim when idealism conflicts with realism.
The CSI’s analyze overpowering evidence in order to determine if a man worked alone or had an accomplice in the killing of his wife and co-workers. The man barricades himself in a casino hotel taking a woman as a hostage. Concerned that time is running out a member of the team steps up and put himself in the line of fire in order to save the hostage.
After Captain Brass's shooting, the team confronts their toughest choice by holding power of attorney. Meanwhile, when a small-waisted decapitated man's body is found, the team discovers that it was really a cover up for murder. They delve deeper into the the man's weird lifestyle of routinely wearing corsets.