‘NCIS’ Hits Episode 500: Showrunner Steven D. Binder on Surviving Cast Turnover and Why He Believes ‘There Will Be Always Be an ‘NCIS,’ Barring the Total Collapse of the Network Broadcast Model’

There’s the Indy 500, and then there’s the NC-500. “NCIS” will air its 500th episode Tuesday night — a rarefied air shared in scripted prime-time television only by “Gunsmoke,” “Lassie,” a couple of “