VIDEO : Pauley Perrette To Leave 'NCIS' At End Of Season

?NCIS? is the most-watched drama on broadcast television, which is quite an achievement considering the CBS series just kicked off its 15th season. But it will soon lose female-lead Pauley Perrette, who this morning said she?s hanging up her lab coat at this end of the current run. The fan-favorite actress behind forensic scientist Abby Sciuto has been in all 331 episodes of the series to-date. Losing her deals the franchise?s flagship series a big blow ? especially considering Michael Weatherly walked away a year ago ? and no one knows that more than CBS. Producers are bringing in Maria Bello soon to help cushion the eventual Perrette blow.