The origin story of Leroy Jethro Gibbs has finally begun: CBS kicked off its much-anticipated prequel Monday from veteran NCIS writers-producers Gina Lucita Monreal and David J. North, as well as CBS Studios. And as promised, Mark Harmon returned to both narrate and to appear fireside as he journals about his life.

The cast for the latest addition of the NCIS franchise looks promising! Who is in the NCIS: Origins cast? Keep reading to find out. NCIS: Origins is the prequel series centering on a young Leroy Jethro Gibbs,

Go back in time as a young Leroy Jethro Gibbs begins his career as a newly minted special agent in the new CBS series "NCIS: Origins."