CSI: Crime Scene Investigation physical evidence to solve murders. The team is originally led by Gil Grissom (Petersen), a socially awkward forensic entomologist and career criminalist who is promoted to CSI supervisor following the death of a trainee investigator. Grissom's second-in-command, Catherine Willows (Marg Helgenberger), is a single mother with a cop's instinct. Born and raised in Las Vegas, Catherine was a stripper before being recruited into law enforcement and training as a blood-spatter specialist. Following Grissom's departure during the ninth season of the series, Catherine is promoted to supervisor. After overseeing the training of new investigator Raymond Langston (Fishburne), Willows is replaced by
CSI: Crime Scene Investigation widescreen transfer with DTS-HD Master Audio 7.1 surround sound. Extras include commentaries, featurettes and BD-Live functionality. Season 8 was released on Blu-ray on May 29, 2009, in Region B. "CSI" has also been released as a series of mobile games. In Fall 2007, CBS teamed up with game developer Gameloft to bring "CSI" to mobile phones. The first of the series to be published was "". The game features actual cast members such as Alexx Woods and Calleigh Duquesne who are trying to solve a murder in South Beach with the player's assistance. The game is also available for download