Mark Harmon is best known today for playing the no-nonsense, tough-but-fair Leroy Jethro Gibbs on NCIS. But what if I told you that before all the boat-building and head-slaps, Harmon delivered one of his most underrated performances in another iconic political drama? Yep, we’re talking about The West Wing—and more specifically, his intense and emotionally-charged role in Season 3.
So, if you’re a die-hard NCIS fan, it’s time to rewind the clock. Let’s dive into why The West Wing Season 3 is essential viewing for anyone who can’t get enough of Mark Harmon.
Who Did Mark Harmon Play in The West Wing?
Harmon as Secret Service Agent Simon Donovan
In Season 3 of The West Wing, Harmon appears as Simon Donovan—a Secret Service agent assigned to protect Press Secretary C.J. Cregg after she receives a credible death threat. His role spans four episodes, but wow, what an impact he makes in such a short time.
Agent Donovan is charming, calculated, and layered with quiet strength—kind of like Gibbs in a suit. His chemistry with C.J. (played by the amazing Allison Janney) lights up the screen. The moment he enters the story, the stakes rise and emotions follow.
Why NCIS Fans Will Love Harmon’s Performance
A Glimpse Into the Gibbs That Would Come
Donovan may not be Gibbs, but you’ll definitely see early shades of the character. The stoic presence. The quiet confidence. The deep sense of responsibility. Harmon absolutely nails this emotionally loaded character arc, and it shows just how good he was even before NCIS launched in 2003.
A Role With Emotional Depth
Unlike the typically restrained Gibbs, Donovan gets to show more vulnerability—especially in his tender scenes with C.J. It’s a softer side of Harmon, and it hits differently.
Breaking Down Simon Donovan’s Arc
Episode Appearances That Matter
Harmon appears in four Season 3 episodes:
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“We Killed Yamamoto”
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“Posse Comitatus”
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“We’re Going to the Catskills”
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“The Black Vera Wang”
Each appearance deepens our understanding of Simon Donovan’s character. Whether it’s protecting C.J. or navigating the tension between duty and affection, Harmon delivers.
Chemistry with C.J. Cregg
Their relationship isn’t just believable—it’s magnetic. You root for them. You feel their connection. Their banter? Effortless. Their goodbye? Gut-wrenching. Harmon and Janney have the kind of chemistry you don’t fake. It’s electric.
The Shocking Ending
Let’s not spoil it all, but prepare yourself—Donovan’s storyline doesn’t end with a white picket fence. His final episode will leave you stunned and emotional. It’s one of the most powerful moments in the series and solid proof that Harmon knows how to leave a mark, even in limited screen time.
The West Wing vs. NCIS: Same Actor, Different Worlds
Comparing Two Powerful Roles
In NCIS, Gibbs is a team leader with a strict moral code and a haunted past. In The West Wing, Donovan is a protector caught between duty and the stirrings of unexpected romance. Different roles, yes—but Harmon brings the same intensity and commitment to both.
Acting Range on Display
Let’s be real—Mark Harmon doesn’t always get enough credit for his range. These two roles show just how versatile he is. If you’re used to Gibbs, seeing him as Donovan will be a revelation.
Why Now Is the Perfect Time to Watch
The West Wing Is Streaming—So No Excuses
You can stream The West Wing on Max. The production quality still holds up, the writing is razor-sharp, and Harmon’s arc is as relevant today as it was two decades ago.
It Completes the Mark Harmon Picture
If you’re a serious Harmon fan, this is the missing puzzle piece. The West Wing lets you see the quieter, more romantic, more tragic side of an actor you thought you knew.
How This Role Helped Launch NCIS
A Stepping Stone to Gibbs
There’s no doubt Harmon’s performance in The West Wing helped solidify his place as a dramatic heavyweight. When NCIS producers were casting the role of Gibbs, this arc proved Harmon had the gravitas needed to lead a series.
Behind the Scenes: Harmon’s Take on the Role
In interviews, Harmon has spoken highly of his time on The West Wing. He admired the writing and cast, and he was grateful for the chance to play such a layered role. It wasn’t just a paycheck—it was a creative challenge.
What Critics Said About Harmon’s Performance
Harmon earned an Emmy nomination for his guest appearance as Simon Donovan. That’s right—just four episodes and he got Emmy buzz. That alone speaks volumes.
Other Must-Watch Harmon Roles for NCIS Fans
If The West Wing left you wanting more, check these out:
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Chicago Hope – Another pre-NCIS drama where Harmon shines.
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St. Elsewhere – Classic medical drama that gave him serious screen time.
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Summer School – For something lighter but still Harmon.
Conclusion: Don’t Miss This Version of Mark Harmon
If you think you know Mark Harmon just from NCIS, you’re missing out. His performance as Simon Donovan in The West Wing is captivating, emotional, and arguably some of his best work. It’s a perfect blend of action, heart, and raw honesty.
So yeah, grab some popcorn, fire up the Max app, and meet the Secret Service agent who might just steal your heart—before Gibbs ever built a boat in his basement.
FAQs
Q1: What episodes of The West Wing does Mark Harmon appear in?
A1: Harmon appears in four episodes during Season 3: “The Black Vera Wang,” “We Killed Yamamoto,” “We’re Going to the Catskills,” and “Posse Comitatus.”
Q2: Is Mark Harmon’s character in The West Wing anything like Gibbs from NCIS?
A2: While both characters are serious and duty-bound, Simon Donovan is more emotionally open than Gibbs, showing a different side of Harmon’s acting chops.
Q3: Did Mark Harmon win any awards for his West Wing role?
A3: He received an Emmy nomination for Outstanding Guest Actor in a Drama Series for his performance as Simon Donovan.
Q4: Where can I stream The West Wing?
A4: You can watch The West Wing, including Season 3, on Max (formerly HBO Max).
Q5: Is The West Wing worth watching even if I just want to see Mark Harmon?
A5: Absolutely. While Harmon’s role is brief, it’s powerful. Plus, the show itself is a masterclass in writing and ensemble acting.
