Summary
- Mark Harmon was drawn to playing Gibbs on NCIS because of the character’s name Leroy Jethro Gibbs.
- Leroy Jethro Gibbs is an integral part of NCIS’s success due to his unique and memorable qualities.
- Fans can watch NCIS seasons 1-19 on Hulu and seasons 1-22 on Paramount+ to revisit Gibbs’s storylines.
Since Mark Harmon’s character Leroy Jethro Gibbs from NCIS departed his team and moved to Alaska in season 19, episode 4 titled “The Great Wide Open,” fans have been yearning for his distinctive charm. Known as a sniper in the U.S. Marine Corps, Gibbs has faced personal tragedies like the loss of his wife and daughter, shaping his unique approach to every investigation. He is also recognized for his set of rules that guide both his personal and professional life. Fans were given a peek into Gibbs’ past with season 1 of the prequel series NCIS: Origins, which Mark Harmon himself narrates.
In various roles, Harmon has shone brightly, such as Simon Donovan on The West Wing in season 3, yet none compare to Gibbs. The actor shared his thoughts on why he was drawn to portray the special agent in an interview, and it’s truly intriguing to listen to his insights.
Mark Harmon Said Yes To NCIS Because Of One Element

When I sat down with Fox News Digital for an interview, I shared my thoughts on delving into the script for NCIS and why I found the role intriguing.
As a dedicated fan, I found myself immersed in numerous scripts, when a particular one caught my eye. The name that stood out to me was Leroy Jethro Gibbs. However, for a brief moment, it seemed to transform into Bob Robinson or so. Instantly, I picked up the phone and demanded, “The name must be restored!” Someone responded, “You can’t portray a character named Leroy Jethro Gibbs.” To which I retorted, “Why not?
Harmon added:
“If that name had not been there, I don’t think I would have been there.”
Fans may have assumed Harmon agreed to the part due to the exciting plotline or the opportunity to be part of a potentially popular and enduring series. However, what’s intriguing is that he was attracted to the show primarily because it features Gibbs’s character.
A good number of admirers might concur that the moniker Leroy Jethro Gibbs possesses a distinctive, fitting quality. The name carries an air of strength, durability, and memorability, and indeed, “Bob” falls short in comparison. Much like it’s challenging to envision another performer assuming Gibbs’s role, it’s equally difficult to imagine him with any other name. It fits him perfectly and encapsulates his resolute character.
Regardless of what character name was eventually chosen, there’s no question that this rough-around-the-edges yet compassionate special agent played a crucial role in the show’s triumph, and viewers admired Harmon’s acting. Although many enjoy watching Alden Parker (Gary Cole), it was challenging for audiences to bid farewell to Gibbs. In an oral history of NCIS published on The Hollywood Reporter for the show’s 20th anniversary in September 2023, Susan Bluestein, the casting director, provided insights about Harmon landing the role. Bluestein stated:
In my role as a film critic, I faced an arduous task when it came to casting for our 1991 movie of the week. I chose Mark Harmon to embody the enigmatic John Dillinger, and he truly delivered a remarkable performance. From the moment Mark was on my radar, I knew he belonged on my list for this project. There was an undeniable weight and depth in his acting ability that perfectly captured the essence of this complex character.
In the latest season 22 episode of NCIS, it was enjoyable to watch Timothy McGee (Sean Murray) have a dream about Gibbs. There remains anticipation that Harmon might return, allowing Gibbs to support his former colleagues again.
Fans Can Watch Mark Harmon On NCIS Seasons 1-19 On Two Streaming Services

Fans eager to delve back into the world of NCIS and retrace the intricate storylines of character Gibbs, or maybe catch up on episodes they’ve missed, have a couple of options. The series is available for streaming on two platforms: Seasons 1 through 11 can be found on Hulu, while all 22 seasons are accessible on Paramount+. Watching Gibbs share light-hearted banter with his colleagues, strategize during complex cases, or navigate personal dilemmas never fails to entertain. Despite his commanding presence, Gibbs maintains an air of enigma, skillfully balancing control in challenging situations.
The final episode of NCIS season 22 titled “Nexus” aired on CBS on May 5th, 2025. The next season, season 23, is planned to debut during the fall broadcast schedule of 2025. After each episode aired on CBS, it became available for streaming on Paramount+ the following day. This practice is likely to continue for the upcoming season as well. Additionally, fans can anticipate watching more of Gibbs’s backstory in season 2 of the prequel series NCIS: Origins, which is scheduled to air later in 2025.
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2025-05-17 17:05