During the course of the investigation, they also uncovered a roll of film that had incriminating evidence about the old casino. Meanwhile, Ronnie and the day crew investigate 40-year-old skeletal remains found at the site of a new casino being constructed as the project was orchestrated by Catherine's late father, Sam Braun, she excuses herself from the case due to conflict of interest. While examining a bee colony as part of that investigation, Sara accepts Grissom's marriage proposal.

The hanging death of a male with breasts more typical for a female is connected to a tainted water supply. Meanwhile Sara and a new CSI, Ronnie, investigate the death of a homeless man found on a garbage pile.

The team investigates the murder of a couple and their younger daughter, and the disappearance of their older daughter ( Britt Robertson), who is believed to be possessed by the devil the prime suspect of the case was a preacher whom the daughter's parents believed he ' exorcised' to death. Also, Ecklie has concerns for Grissom and Sara, after observing that they're being too close in the workplace. Meanwhile, Catherine and Warrick work to unravel the mysterious murder of a popular men's magazine publisher at a restaurant where patrons dine in the dark. When a road cleanup crew discovered a helmeted head of a high school-aged teen, Grissom, Nick, and Greg investigate the death of a go-kart racer whose headless body is found yards away from the highway he was racing on. With Natalie Davis, ' The Miniature Killer', giving no answers to Sara's whereabouts, Grissom and his team use whatever evidence they had to piece together clues to search for Sara, left to die underneath a wrecked car in the desert - a scene replicated by her miniature scene. Teleplay by : Dustin Lee Abraham & Allen MacDonald Some international broadcasters only showed the first part of the crossover ' Who and What' because Without a Trace did not air (or aired older seasons) at the time. Only six more episodes were made after the strike, for a total of only 17 episodes. Only 11 episodes had been completed and aired before the 2007 Writers Guild of America strike. This is the final full season to star Gary Dourdan and William Petersen, and the last season to feature every original main cast member in a starring role. Louise Lombard departed the cast after the first episode of the season, while Jorja Fox signed on for only the first seven episodes.

Charlie Sheen ('Two and a Half Deaths').

Adam Savage ('The Theory of Everything').

Jamie Hyneman ('The Theory of Everything').

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