Commission success and impact. While there is growing interest in examining what long. With 21 seasons and over 450 episodes of gibbs (mark harmon) & co. , how do you choose the best ones? You don’t have to. Verkkothe original ncis showrunner and the show's lead reportedly had a difficult working relationship together, with harmon and bellisario allegedly often. Verkkohow did it become one of the most popular shows on television? That's a question worthy of its own investigation—one we'll call the untold truth of ncis. Verkkowhen we first see tony, he has been taken prisoner in somalia by a terrorist named salim ulman. It is presumed, correctly, that he went looking for. Verkkothe ncis' 1000th episode exposes the harsh truth about the status of the team after mark harmon's exit as leroy jethro gibbs. Verkkothe truth is out there. The body of a petty officer falls from a ceiling at a nightclub; Ducky says that someone dressed. Verkkoby far the most memorable episode for any ncis fan, family first is full of revelations and twists.