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Mark Harmon news
Archived — this story has rotated out of today’s deck. It is kept here in full.
The gist
Mark Harmon returns as Gibbs in all 10 episodes of NCIS: Origins Season 3, premiering October.
His full-time return expands his role beyond narrator, tying a present-day mystery to Gibbs'.
Background
Mark Harmon played Leroy Jethro Gibbs on NCIS for 18 seasons before departing in 2021. He remained an executive producer and narrated the prequel series NCIS: Origins, which follows a young Gibbs in the early '90s. CBS announced on June 30 that Harmon would return onscreen for all of Season 3, a major development for the NCIS universe.
How it unfolded
- Oct 2021Mark Harmon departs NCIS after an 18-season run, but remains an executive producer.
- Oct 2024NCIS: Origins premieres, with Harmon narrating and making a sporadic onscreen appearance.
- Jun 30, 2026CBS announces Harmon will return as Gibbs for all 10 episodes of Season 3.
- Sep 2, 2026CBS releases first-look photos of Harmon's return, and the show celebrates his 75th birthday.
- Oct 6, 2026Season 3 premiere airs at 10/9c, featuring Harmon's Gibbs in present-day Alaska as ghosts from his past catch up.
Who’s saying what
- Official
- CBS teases that Harmon's return is part of a present-day mystery tied to his '90s Camp Pendleton days, unfolding all season.
- Actor
- Harmon says the new season reminds him of doing the original series early on, and they aim to do 'the 10 best shows that we can.'
- Public
- Fans are emotional over the show's heartfelt tribute to Harmon on his 75th birthday, ahead of his return.