NCIS star Mark Harmon speaks about his return as Gibbs, gives his son Sean credit for the new show!!!!!

Mark Harmon remains an important component of the NCIS Universe, even though he is no longer starring on the flagship show.

NCIS fans already knew Mark was part of the new prequel show, but nearly everyone thought it would only be behind the scenes. When NCIS fans tuned in for the NCIS: Origins season premiere, there was Mark, resuming the role television audiences have loved for years.

NCIS: Origins is a new show about Young Gibbs. CBS rolled out two episodes on its debut night, giving fans a lot of content to absorb.

Mark serves as an executive producer and the narrator for the show, as Leroy Jethro Gibbs tells stories from his past. Austin Stowell stepped in to play the Young Gibbs and made an immediate impact.

On premiere night, CBS viewers saw Mark sitting by a campfire and jotting portions of his memoir. The episode would shift back and forth between the Young Gibbs in 1991 and the current Gibbs in Alaska.