Mark Harmon Returning To ‘NCIS: Origins’ As Gibbs For Season 3

Mark Harmon is returning to NCIS: Origins for a season-long arc.

Harmon, who previously starred as Leroy Jethro Gibbs for 18 seasons on NCIS, will appear in all episodes of Season 3 as part of a present-day mystery tied to his ‘90s Camp Pendleton days. This marks his third appearance on the spinoff series, though it’ll be the first time his character is part of the entire story.

The story seemingly kicked off when he appeared in Season 2 for a Veterans Day crossover between NCIS and Origins featuring the younger Gibbs (Austin Stowell) and his team investigating the small-town death of a naval officer in the ‘90s on Origins – a case that was unexpectedly reopened in the present day on NCIS.

Harmon, who serves as executive producer on the series, also narrates each episode of Origins. He also previously reprised his role in the series premiere.

NCIS: Origins follows a young Leroy Jethro Gibbs (Stowell) in the early ‘90s, years prior to the events of the flagship series. The series also stars Kyle Schmid, Mariel Molino, Tyla Abercrumbie, Diany Rodriguez and Caleb Foote.

Origins Season 3 executive producers are David J. North, Mark Harmon, Sean Harmon, Michele Greco and Eric Christian Olsen. The series is produced by CBS Studios.

Season 3 of NCIS: Origins will air Tuesdays at 10 p.m. ET/PT in the fall on CBS.