---
title: "Mark Harmon Returns Full-Time as Gibbs in 'NCIS: Origins'"
description: "Mark Harmon is suiting up as Leroy Jethro Gibbs on screen again — this time for a full season-long arc in the CBS prequel 'NCIS: Origins,' his first sustained acting return to the franchise since he left the flagship series in 2021."
category: "Entertainment"
category_url: https://herald.la/category/entertainment
author: "Mei-Lin Tang"
published: 2026-06-30T18:48:00.000Z
updated: 2026-06-30T18:48:00.000Z
canonical: https://herald.la/article/mark-harmon-returns-full-time-as-gibbs-in-ncis-origins
tags: ["NCIS Origins", "Mark Harmon", "Gibbs", "CBS", "television", "NCIS"]
---
# Mark Harmon Returns Full-Time as Gibbs in 'NCIS: Origins'

Mark Harmon is suiting up as Leroy Jethro Gibbs on screen again — this time for a full season-long arc in the CBS prequel 'NCIS: Origins,' his first sustained acting return to the franchise since he left the flagship series in 2021.

For years, Mark Harmon's Gibbs has been a voice in *NCIS: Origins*. Next season, he gets a face — and a story of his own.

## The return

Harmon will appear on screen in every episode of the prequel's third season, [Variety](https://variety.com/2026/tv/news/mark-harmon-gibbs-return-ncis-origins-season-3-1236799407/) and [Deadline](https://deadline.com/2026/06/mark-harmon-ncis-origins-season-3-cast-1236971337/) reported — his first sustained on-screen acting commitment to the *NCIS* universe since he stepped back from the flagship series in the 2021-22 season. Until now, his role in *Origins* had been limited to narrating as the present-day Gibbs and serving as an executive producer, with on-screen appearances confined to the series premiere and a crossover.

## How it works

*NCIS: Origins* is set largely in the early 1990s and follows a young Gibbs — played by Austin Stowell — as a new agent at Camp Pendleton. According to Variety, the new season adds a present-day mystery tied directly to those early years that unfolds across the whole season, giving Harmon a substantial dramatic thread while Stowell continues to carry the period timeline. It is a more serialized structure than the franchise, built on self-contained cases, usually attempts.

## A long history with the role

Harmon originated Gibbs when *NCIS* premiered on CBS in 2003 and played the taciturn investigator for some 18 seasons before his exit, which the show handled quietly. He and his son Sean Harmon are among the prequel's executive producers. *NCIS: Origins* has performed well for CBS since its 2024 debut, earning a renewal while its second season was still airing.

## What to expect

The third season is set to run on CBS in the fall, with reporting indicating a shorter, roughly 10-episode order. A specific premiere date has not been announced. For the franchise's sizable and loyal audience, the draw is clear: not a nostalgic cameo, but the original Gibbs anchoring a full season — told across two timelines decades apart.

## Sources

- [Mark Harmon returning as Gibbs in 'NCIS: Origins' Season 3 story arc](https://variety.com/2026/tv/news/mark-harmon-gibbs-return-ncis-origins-season-3-1236799407/)
- [Mark Harmon returning to 'NCIS: Origins' as Gibbs for Season 3](https://deadline.com/2026/06/mark-harmon-ncis-origins-season-3-cast-1236971337/)