Mark Harmon: Why He Left NCIS and What He Does Now

Mark Harmon stepped away from his iconic role as Leroy Jethro Gibbs on NCIS in 2021 after 18 seasons, citing exhaustion and a desire for creative closure. His final episode as a series regular aired on October 11, 2021, but he remains connected to the franchise as an executive producer and narrator. This article separates documented facts from fan speculation, drawing on Harmon’s own statements and reporting from major entertainment outlets.

Last checked: 2026-07-16

Full Name: Thomas Mark Harmon · Born: September 2, 1951, Burbank, California · Known For: Lead role of Leroy Jethro Gibbs on NCIS · Profession: Actor, writer, producer, television director, former football player · Emmy Wins: 4 · Emmy Nominations: 17

Why did Mark Harmon abruptly leave NCIS?

Harmon exited during season 19 in an episode titled “Great Wide Open,” where his character Gibbs chose to stay in Alaska rather than return to Washington, D.C. The actor later explained on a season‑19 DVD featurette that the character’s story arc had reached “an honest place” to step away (IMDb via Entertainment Tonight). In subsequent interviews, he elaborated: “For the longest time, I was just tired” (IMDb). Coverage from Slashfilm and CBR frames the departure as amicable, driven by fatigue and a desire for creative renewal rather than behind‑the‑scenes conflict.

After leaving, Harmon remained an executive producer on the flagship NCIS and later became narrator/executive producer of the prequel NCIS: Origins (People). That dual role—appearing only as a voice while shaping the show’s direction—reflects his stated desire to “push away a little bit” without fully cutting ties. The bottom line: Harmon’s decision was a personal one, grounded in exhaustion and creative closure, not scandal.

What does Mark Harmon do today?

Since leaving NCIS, Harmon has pursued a mix of writing, producing, and selective acting. In November 2023 he co‑wrote Ghosts of Honolulu: A Japanese Spy, A Japanese American Spy Hunter, and the Untold Story of Pearl Harbor with former NCIS special agent Leon Carroll Jr. (Hello!). While promoting the book, he told Hello! that he is “not retired” and appreciates having more time to relax.

On the acting front, Harmon is set to appear in Freaky Friday 2, his first major film project in several years (IMDb). He also continues as narrator and executive producer of NCIS: Origins, a role that keeps him connected to the franchise without the daily grind of a series lead (Yahoo Entertainment). His net worth is not officially disclosed, but several industry commentators estimate his NCIS salary at roughly $500,000–$525,000 per episode in later seasons (YouTube commentary – unverified).

Mark Harmon age and personal life

Born September 2, 1951, he is 73 as of 2025. He has been married to actress Pam Dawber since 1987, and they have two adult sons, Sean and Ty Christian (Hello!). His family was frequently cited as a factor in his decision to reduce his workload.

Why didn’t Michael Weatherly and Mark Harmon get along?

Reports of tension between Harmon and Weatherly, who played Special Agent Tony DiNozzo, have surfaced over the years. Neither actor has given a detailed on‑record account of a feud, but media outlets have noted that their working relationship soured during or after Weatherly’s time on NCIS. A CBR article summarizing Harmon’s exit mentions “long‑running gossip about cast tensions” but states that his departure itself was amicable. Without direct confirmation from either party, the extent of any conflict remains speculative. The catch: Harmon’s exit was not publicly linked to Weatherly; fatigue and creative reasons were the stated causes.

Did Mark Harmon go to Ducky’s funeral?

No. Harmon did not attend the on‑screen funeral of Dr. Donald “Ducky” Mallard, nor did he return for the episode’s production. The NCIS boss explained in an interview that Harmon’s absence was not a snub—rather, it was a creative choice that honoured the character’s storyline. The funeral episode aired in 2024, and Harmon’s non‑participation was framed as a result of his character’s Alaska‑based exit, not personal animosity (MovieWeb). The implication: The door was left open for a eventual return, but it hasn’t happened yet.

““What has always drawn me here is the character I play and to keep it fresh and to keep it challenging.””

– Mark Harmon, Actor and former NCIS lead, speaking in a season 19 DVD featurette

““Plot-wise, this character has taken the path that it did. I thought it was honest and OK with.””

– Mark Harmon, Actor discussing Gibbs’ exit storyline

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Fans curious about the actor’s decision to step away can read more about Mark Harmons NCIS exit and his current projects.

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