Greg scanning the desert in a helicopter and Nick and Warrick tackling Natalie's bizarre and terrifying apartment. Nick gets the luckiest break when he finds the location of the auto yard where Natalie purchased the Mustang. That clue and the digital maps Natalie had stored on her computer provide the team a radius with which to narrow their search.

The CSIs investigate two bizarre cases -- one involving the death of a go-cart racer and one involving a murder at a hip, new restaurant.

The CSIs are called to investigate when an entire family is murdered, except for the daughter who claims to be possessed by the devil.

Grissom and his team of CSIs find the body of a man who died due to strangulation by hanging whose body appeared to be that of a woman.

Grissom and the CSI team go behind the scenes at an adult horror film studio following the murder of a lead actress.

Jack Malone of the 'Without A Trace' FBI team joins Grissom and the Vegas CSIs as a missing boy he is searching for may be the body the CSIs are investigating. The crossover concludes in the episode of Without a Trace following.

In the final episode featuring Jorja Fox, a suspect from Sara's past reemerges, causing her to question her future with the CSIs.

Meanwhile, each member of the CSI team approaches Grissom in an attempt to comfort him in Sara's absence. He reveals he has spoken to her a few times, and currently she's in San Francisco visiting her mother. Although no one is able to emotionally break through to Grissom, Hodges involves him in one of his "scenarios." Always one to enjoy a good puzzle, Grissom joins in by solving the last of Hodges' set-ups.

Lou says he knew Jason and loved the kid. But a Hollywood manager friend of Jason's tells Warrick that Gedda beat him up at his club. Jason called out Gedda and vowed never to bring talent back to his strip club. Warrick believes Gedda's got cops on his payroll, and he shows up to check out the club. Gedda's not too happy to see him nosing around.

Meanwhile, Doc Robbins gives evidence when a philanthropist, Liz Rodriguez, turns up dead amongst dozens of dead dogs in the desert. She had been at a party the night before where Robbins was playing in a band. The trail leads to a gang member's dog, and a kennel that the Rodriguez family bankrolled. Apparently Liz was the #1 dogfighter in Vegas.

Soon, another murder is tied to Cody's: his prostitute ex-girlfriend Tiffany, who died in a hit and run accident. Cody's truck has damage to its front end, leading the CSIs to believe he was responsible for her death. To make things even more complicated, the dead girlfriend's pimp Ricky is found dead the following day of a shotgun wound at a local bar.

Grissom and his team come down with the flu as they are called in by DDA Klein to look into the deaths of several witnesses in a grand jury case against a violent Las Vegas gang.

The violent death of a 3-year-old girl takes a personal toll on Catherine as she searches for the victim's killer.

Tonight's episode of CSI opens with a dramatic shooting in a dark room, a platinum blonde the victim. Gil (William Petersen) and Nick (George Eads) are the first ones at the scene the next day. The vic has two entry wounds, two exit wounds, both through-and-throughs. There are seven empty bullet casings on the floor. .

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.

Stokes talks with one of the sitcom employees and shows him security footage from an elevator on the night that Annabelle was murdered. He points out that Bud visited her that night as well as one of the writers from the show. Natasha, Annabelle's assistant and stand in, is also seen in the elevator. Brass heads right out to get some answers from Natasha, who says that working for Annabelle was a nightmare.

Nick and Grissom check out Harper's office. It's tidy. Grissom notices there's no liner in a trashcan and that the paper shredder has been emptied. Nick finds car keys in the drawer. He beeps the car. They go check it out. It's clean. Grissom thinks it was just detailed and that maybe it was used to transport the body..