Now... This makes 'CSI' an all-white cast, right? CBS are probably going to bring an african-american female lead. CCH Pounder is incredible, I hope that happens. If Catherine is demoted, that means logically Nick has to be demoted, the show wouldn't work without Cath in a leadership role, she's always been in charge/second in charge. Unless she decides she can't work under Nick, Sara & Greg, and so thats why she leaves.