NCIS: Origins' Austin Stowell Talks Gibbs' Rules And Reveals The Real-Life Rule He Learned From 'Sage' Mark Harmon

NCIS’ Gibbs prequel series NCIS: Origins has been taking fans back to the ‘90s pre-NCIS to follow a young Leroy Jethro Gibbs, played by Austin Stowell.

While Origins focuses on a young Gibbs with Harmon serving as narrator and EP.

Even though the prequel series has slowly been introducing the Gibbs Rules, the series has yet to reveal other aspects of Gibbs.