NCIS

9PM, FOX ★★★★

Why would Gibbs (Mark Harmon, left) shoot Mcgee? That is the question hanging over this exciting opener to the new, 18th season, in which the NCIS veteran goes off the books with an edgy Fornell, who now looks more like Willie Nelson than the stiff FBI man he was when we first met him, way back in the very first episode.