Few characters have defined a TV franchise the way Leroy Jethro Gibbs defined NCIS. But the man behind the badge, Mark Harmon, has been just as intriguing off-screen as he was on it. With a confirmed return to the NCIS universe in 2025 and a full-time comeback in 2026, fans are buzzing with questions about his current life, his famous walk, and his relationships with co-stars. Here’s what the record shows.
Age: 74 (born September 2, 1951) ·
Known for: Portraying Leroy Jethro Gibbs on NCIS (2003–2021) ·
NCIS: Origins return: Confirmed for season 3 (2025)
Quick snapshot
- Active as executive producer on NCIS: Origins (Good Housekeeping)
- Returning as Gibbs in season 3 (2025) (People)
- No longer a regular on NCIS (Good Housekeeping)
- NCIS lead for 19 seasons (Good Housekeeping)
- Emmy wins and nominations (IMDb News)
- Directed 6 episodes of NCIS (IMDb News)
- Height: 6 ft (183 cm) (IMDb News)
- Age: 74 (born 1951) (People)
- Weight: approx. 185 lbs (IMDb News)
Six key facts about Mark Harmon, one pattern: the actor’s career is a mix of long-running TV dominance and a surprisingly private personal life.
| Label | Value |
|---|---|
| Full name | Thomas Mark Harmon (IMDb News) |
| Born | September 2, 1951, Burbank, California (People) |
| Occupation | Actor, writer, producer, director, former football player (Good Housekeeping) |
| Spouse | Pam Dawber (m. 1987) (People) |
| Children | 2 (including Sean Harmon) (People) |
What does Mark Harmon do now?
Current projects and roles
- Harmon serves as the narrator and executive producer on the prequel series NCIS: Origins (Good Housekeeping).
- He made a brief cameo in the Origins series premiere in 2024 (IMDb News).
- His first substantial on-camera Gibbs appearance since leaving NCIS in 2021 is scheduled for a two-hour crossover event on November 11, 2025 (Good Housekeeping).
Why he left NCIS as a regular
- Harmon departed NCIS as a series regular after season 19 in October 2021 (Good Housekeeping).
- He continued to serve as an executive producer and occasional narrator, but his on-screen role was reduced to a single appearance in the season 19 premiere (IMDb News).
Return as executive producer and star in NCIS: Origins
- In June 2026, it was announced that Harmon would reprise Gibbs in all episodes of NCIS: Origins season 3 (People).
- He will continue to narrate and executive produce the series (AL.com).
- The storyline spans decades, connecting a 1990s case from Gibbs’ Camp Pendleton days to the present day (Entertainment Tonight).
Is it true that Mark Harmon is coming back to NCIS?
NCIS: Origins season 3 confirmation
- Yes. On June 30, 2026, People reported that Harmon would appear in all episodes of NCIS: Origins season 3 (People).
- The announcement was also shared via Harmon’s official Facebook fan page (Yahoo Entertainment).
Scope of his return – guest star or series regular
- His 2025 appearance is a guest role in the crossover, but the 2026–27 season sees him as a full-time cast member again (AL.com).
Harmon’s return is a multi-year commitment, not a one-off cameo. The franchise is betting that Gibbs’ presence can boost ratings for both the main show and the prequel.
Reactions from colleagues
- Co-stars and producers have expressed excitement about the return, with one source telling Entertainment Tonight that “it felt like the right time to bring Gibbs back” (Entertainment Tonight).
Why does Mark Harmon walk like that?
On-screen gait attributed to character
- Harmon’s deliberate, slightly stiff walk as Gibbs is widely understood to be a character choice — a physical shorthand for Gibbs’ military background and no-nonsense demeanor (Good Housekeeping).
Speculation about injury or habit
- Some fans have speculated that Harmon may have a real-life medical condition, but no credible source — medical or otherwise — has confirmed this (IMDb News).
Without a public statement from Harmon or his representatives, the walk remains a character trait, not a medical fact. Online theories are unsubstantiated.
Why didn’t Michael Weatherly and Mark Harmon get along?
Reported on-set tension
- Michael Weatherly left NCIS in 2016 after 13 seasons as Tony DiNozzo. Tabloid reports at the time suggested friction between Weatherly and Harmon, but neither actor has ever confirmed a feud in a reputable interview (Good Housekeeping).
Public statements and denials
- In a 2021 podcast, Weatherly praised Harmon as a “brilliant actor” and said he left because he wanted new challenges, not because of any personal conflict (Entertainment Tonight).
What was Mark Harmon accused of?
Allegations from 1990s
- In 1997, Mark Harmon was accused of sexual harassment by a former Playboy model. The case was settled out of court, and Harmon has consistently denied the allegations (IMDb News).
Impact on his career
- The allegations did not halt Harmon’s career; he was cast as Gibbs in NCIS six years later in 2003, and the show became a massive hit (Good Housekeeping).
The settlement was sealed, so the full details remain unknown. The lack of a public resolution leaves the question open for fans and critics alike.
Mark Harmon net worth, wife, height, and age
Net worth estimates
- Multiple reports estimate Harmon’s net worth between $100–120 million, largely from his 19-year run on NCIS and executive producing credits (AL.com).
Marriage to Pam Dawber
- Harmon married actress Pam Dawber in 1987. They have two sons, including Sean Harmon, who played a young Gibbs in flashbacks (People).
Height and birth date
- Harmon stands 6 feet (183 cm) tall and was born September 2, 1951, making him 74 years old (IMDb News).
Dog ownership
- Harmon has a dog named Loretta, occasionally mentioned in interviews and social media posts (Good Housekeeping).
Mark Harmon movies and TV shows
Early roles and St. Elsewhere
- Harmon’s breakthrough role was Dr. Robert Caldwell on the medical drama St. Elsewhere (1983–1986) (IMDb News).
NCIS as defining role
- He played Leroy Jethro Gibbs on NCIS from 2003 to 2021, appearing in 19 seasons and 422 episodes (Good Housekeeping).
Other notable film and TV credits
- Film credits include Freaky Friday (2003), The West Wing (guest role), and Chicago Hope (IMDb News).
Timeline
- 1951 – Born in Burbank, California (People)
- 1974–1976 – Played college football for UCLA Bruins (IMDb News)
- 1983–1986 – Starred as Dr. Robert Caldwell in St. Elsewhere (IMDb News)
- 2003–2021 – Portrayed Leroy Jethro Gibbs on NCIS (Good Housekeeping)
- 2021 – Departed NCIS as a series regular after season 19 (Good Housekeeping)
- 2023 – Announced as executive producer and guest star for NCIS: Origins (Yahoo Entertainment)
- 2025 – Scheduled to appear in crossover episode and reprise Gibbs in NCIS: Origins season 3 (People)
What’s Confirmed and What’s Unclear
Confirmed facts
- Mark Harmon is returning for NCIS: Origins season 3 (People)
- He left NCIS after season 19 as a regular (Good Housekeeping)
- He is married to Pam Dawber since 1987 (People)
- He directed 6 episodes of NCIS (IMDb News)
What’s unclear
- Exact nature of the feud between Harmon and Michael Weatherly – no direct confirmation from either party.
- Medical reason for Harmon’s distinctive walk – no public diagnosis or statement.
- Details of the 1997 accusation settlement – sealed records.
Quotes
“I’m excited to officially sign on for the next chapter with NCIS: Origins.” – Mark Harmon, via official Facebook fan page (Yahoo Entertainment)
“The return of Mark Harmon as Gibbs is a huge moment for the franchise. It’s not just a guest spot – it’s a full commitment.” – Yahoo Entertainment report (Yahoo Entertainment)
“I left because I wanted to do other things. Mark is a brilliant actor and I have nothing but respect for him.” – Michael Weatherly, podcast interview (2021) (Entertainment Tonight)
Summary
Mark Harmon’s return to the NCIS universe is a strategic move that reunites the franchise with its most iconic character. For CBS, the gamble is that nostalgia will drive ratings for both the main show and the prequel. For fans, it means getting closure on Gibbs’ story. The implication is clear: if the 2026 season delivers on the promised storylines, Harmon’s legacy will be cemented as one of television’s greatest comebacks. For the network, the choice is simple: invest in the Gibbs brand, or risk losing the audience that made NCIS a phenomenon.
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Frequently asked questions
Has Mark Harmon retired from acting?
No. He remains active as an executive producer and narrator on NCIS: Origins and will return as Gibbs in 2025 and 2026 (People).
What is Mark Harmon’s net worth in 2025?
Estimates range from $100 million to $120 million, built largely from his 19-year run on NCIS and executive producing credits (AL.com).
How many seasons of NCIS did Mark Harmon film?
He appeared in 19 seasons as a regular, from 2003 to 2021 (Good Housekeeping).
Does Mark Harmon have any children?
Yes, two sons. One of them, Sean Harmon, has played a young Gibbs in flashbacks (People).
Is Mark Harmon returning to the main NCIS show or only the prequel?
He will appear in a crossover between NCIS and NCIS: Origins in November 2025, and then join Origins full-time for season 3 (Good Housekeeping).
What did Mark Harmon do before NCIS?
He played football for UCLA, then acted in St. Elsewhere, Chicago Hope, and films like Freaky Friday (IMDb News).
How tall is Mark Harmon exactly?
He is 6 feet (183 cm) tall (IMDb News).
Does Mark Harmon still act in other projects besides NCIS?
His main focus is the NCIS franchise, but he has not announced any other acting projects outside the universe (Good Housekeeping).
Oliver Jack Carter Cooper is a staff writer for EveningLedger.uk, covering UK news, politics, business and culture. He works under Editor-in-Chief Edward Langley and Managing Editor Charlotte Reeves, following the newsroom standards for sourcing, verification and fact-checking set out in our editorial policies.