Mark Harmon, who created the role of Gibbs on NCIS, is an executive producer on the prequel—as well as a narrator—and was part of the casting process that resulted in Stowell landing the role. But when it comes to offering advice on playing the character, he’s pretty much hands off.

Origins two-part premiere “Enter Sandman” are ahead! NCIS: Origins has finally premiered on the 2024 TV schedule, mean the time has finally come to explore Leroy Jethro Gibbs’ life in 1991, just a few months after his first wife and daughter were murdered.

NCIS has shown us glimpses of and told us what life was like for Leroy Jethro Gibbs ( Mark Harmon in the original series for 19 seasons) after his wife Shannon and his daughter Kelly were killed. Now, in NCIS: Origins (the two-hour premiere airs October 14 on CBS), we’ll see that, with Austin Stowell playing Gibbs.