Mark Harmon's NCIS: Origins Season 3 return date set
NCIS: Origins Season 3 premieres Tuesday, Oct. 6, 2026, on CBS at 10 p.m. ET, with Mark Harmon appearing in every episode for a season-long arc. The prequel will run parallel stories: young Gibbs at Camp Pendleton in the 1990s and modern-day Gibbs revisiting the case years later.
Key Takeaways
- Season 3 of NCIS: Origins returns Tuesday, Oct. 6, 2026, at 10/9c on CBS.
- Mark Harmon plays present-day Gibbs in every episode of a season-long mystery arc.
- The season pairs Austin Stowell's 1990s Camp Pendleton case with Harmon's modern follow-up.
- Expect a shorter 10-episode run, with Paramount+ dropping episodes at airtime.
- The mothership NCIS and new spinoff NCIS: New York also launch that same night.
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When does NCIS: Origins Season 3 premiere?
NCIS: Origins stays a fall Tuesday show, airing at 10 p.m. ET / 9 p.m. CT on CBS. According to MovieWeb, new episodes will also arrive on Paramount+ at the same time they broadcast, then continue each Tuesday.
Oct. 6 is a stacked night for the franchise: the original NCIS and debuting spinoff NCIS: New York also begin airing new episodes that evening, with New York taking the 9/8c slot ahead of Origins.
What is Mark Harmon's season-long arc about?
Mark Harmon headlined special agent Leroy Jethro Gibbs for 19 seasons of NCIS before exiting in Season 19. On Origins, he has narrated every episode, appeared in the series premiere, and returned for a Veterans Day crossover with the mothership series.
Season 3 expands that footprint. Harmon will appear in every episode as part of a present-day mystery tied to his 1990s Camp Pendleton days. Younger Gibbs, played by Austin Stowell, investigates a case in the past; modern-day Gibbs picks up the thread years later across an action-packed story that unfolds all season.
When viewers last saw Gibbs on NCIS, he had retired to Alaska. In the Veterans Day crossover, modern technology let the team reexamine a 1990s naval-officer death case and bring Harmon's Gibbs back into the story—the same past-and-present bridge Season 3 will use for its dual timelines.
How many episodes will Season 3 have?
Season 3 is reportedly 10 episodes long, down from 18 in each of the first two seasons. The shorter order coincides with Harmon's expanded on-screen role, which many fans will likely welcome even if the season is leaner.
The ensemble still centers on Stowell's Gibbs alongside Mariel Molino, Kyle Schmid, Tyla Abercrumbie, Diany Rodriguez, and Caleb Foote. After Season 2, co-showrunner Gina Lucita Monreal exited to focus on new projects; David J. North continues as sole showrunner, with NCIS: LA star Eric Christian Olsen joining Mark Harmon, Sean Harmon, and Michele Greco as an executive producer.
Season 2's finale also marked the agency's official name change to NCIS, a Gibbs-Lala kiss, and Randy's kidnapping tied to digitizing files—threads fans will watch for as Harmon's present-day arc locks in.