Rally other NCIS fans with the most interactive fan chains online. Pass on NCIS chains to other fans, or start a chain of your own about your favorite NCIS episodes or characters such as Leroy Jethro Gibbs (Mark Harmon), Anthony DiNozzo (Michael Weatherly), Abby Sciuto (Pauley Perrette), Dr. Donald 'Ducky' Mallard (David McCallum), and Timothy McGee (Sean Murray).