Origins" was no easy task, but Mark Harmon was immediately impressed when Austin Stowell auditioned for the prequel.

NCIS: Origins, a prequel to the long-running CBS series NCIS, premiered on the network on October 14. The show focuses on the younger version of Leroy Jethro Gibbs as he begins his tenure as a special agent of the Pendleton branch of the Naval Investigative Service (NIS).

Does a weekly procedural need lore? No. No it doesn’t not. But lore you will be served. The “NCIS” spinoff set in 1991 about young Gibbs functions as one long flashback