The longtime 'NCIS' star tells ET how difficult it was to say goodbye to the cast and crew, and how much she'll miss her character, Abby. Her two-part farewell episode begins Tuesday night on CBS.
Will Abby figure out that Bishop and Palmer were responsible for the damage in her lab? ET exclusively debuts a sneak peek from Tuesday's all-new episode, airing 8 p.m. ET/PT on CBS.