For 15 seasons on NCIS, we've come to admire and adore Abby Sciuto (Pauley Perrette). Now we celebrate what she means to all of us. Don't miss her final episode, "Two Steps Back," on Tuesday, May 8. Watch all new episodes of NCIS on Tuesdays at 8/7c on CBS and CBS All Access.
Air Date: May 7, 2018