CBS prepares finale for long-running cop show 'CSI'

Los Angeles, May 12 (EFE).- U.S. television network CBS has announced an end to the 15-season production run of forensic investigation series 'CSI'.

The series, set in Las Vegas, Nevada, was phenomenally successful throughout the first decade of the century, spawning a major television franchise.

It will go out with a two-hour telefilm, possibly preceded by a mini season, CBS told media including The Hollywood Reporter and Variety on Monday, promising more detail on the series' end-game at an official next season content preview in New York on Wednesday.

The show's axing follows several years of falling ratings.

Between 2010 and 2015, 'CSI' lost nearly 40 percent of viewers in the United States, but still averaged 8.2 million viewers an episode last season, and on occasions even exceeded 10 million, according to data from the Nielsen ratings agency.

'CSI' was at its height of popularity when William Petersen played the role of the socially awkward but talented investigator Gil Grissom.

Petersen left 'CSI' in 2008 and was replaced by Laurence Fishburne, who quit the series in 2011 to be replaced by veteran actor Ted Danson.

The success of 'CSI' led CBS to produce spin-offs set in other locations, including 'CSI: NY' and 'CSI: Miami', that were cancelled in 2013 and 2012 respectively, having never enjoyed the popularity of the original.

The latest spin-off, 'CSI: Cyber', a cyber-crime make-over starring Patricia Arquette that debuted in March 2015, will be the only series from the franchise to continue into next season.

Other series to return to CBS in the fall and next spring include 'NCIS', 'Hawaii Five-0','NCIS: Los Angeles', 'Criminal Minds', 'The Good Wife' and 'Person of Interest'.