NCIS
2003 · 23 Seasons · CBS · Crime, Drama, Procedural
NCIS built itself into one of the most-watched shows in television history not through innovation but through execution, delivering a reliable combination of case-of-the-week crimes, workplace family dynamics, and Mark Harmon's understated charisma as Leroy Jethro Gibbs. The show has never been cutting-edge television, and it was never trying to be. It found a formula that worked, refined it over two decades, and built an audience loyalty that survived multiple cast overhauls and the departure of its lead star.