Who is Beau Knapp in FBI: International? Character, episodes and plot details

If Beau Knapp from FBI: International has been living rent-free in your mind like us, you have landed in the right place. Beau Knapp pops in as Greg Csonka, a gravelly antagonist in Season 4 of FBI: International. In a nutshell, Csonka crashes the Fly Team’s globetrotting groove by bringing his A-game of cunning and danger.

FBI: International follows a crack squad of FBI operatives — based in Budapest — who leap across European hotspots to tackle everything from kidnappings to bio-terror threats. Knapp’s character serves as the chaos agent to Jesse Lee Soffer’s stoic team leader Wes Mitchell.

Expect plot twists, high-stakes courtroom drama, and maybe a little witty banter as the Fly Team races to keep their most dangerous villain grounded.

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Greg Csonka in FBI: International: The role and the episodes, as the plot thickens

Beau Knapp — it’s about time Hollywood cast you as the bad guy again, right? Known for menacing turns in Death Wish, Seven Seconds, and Seal Team, Knapp dons the role of Greg Csonka in Season 4 of FBI: International, and he nails it to the point where you are torn between wanting him cuffed or to sip martinis alongside him.

Csonka is more than just a criminal. He is the kind of slippery schemer that haunts your nightmares. Introduced in the Season 4 premiere (A Leader, Not a Tourist), his criminal reach spans continents and government layers. Officially, he is the guy behind the LCFT — legal counsel for terror finance — but unofficially, he is the personal pain in Wes Mitchell’s side, our team’s recent recruit whose world turns upside down when his partner is killed — at Csonka’s dirty little hands.

Csonka features in three pivotal episodes of FBI: International:

Season 4 Episode 1 (A Leader, Not a Tourist): This is where Csonka struts in, leaving Wes with a personal vendetta after his partner’s death in Los Angeles.

Episode 8 (You'll Never See It Coming): The Fly Team hunts Csonka in Hungary, only to have their star witness murdered behind bars. The courtroom becomes a pressure cooker, pitting Wes’s trauma against Csonka’s cold manipulation.

Episode 9 (The Kill Floor): In Paris, the chase reaches a crescendo — one team member is taken, Vo is critically wounded, and Csonka is on the run. Sure, he is fancier than your average bad guy, but he is far from forgettable.

Inside Episode 8: Legal jousting & emotional fallout

Episode 8 is DMV-lawyer dry for most shows, but here, couture cloakroom drama kicks off. A witness is bludgeoned inside a Budapest prison, potentially collapsing the case before it begins. The Fly Team, led by Wes and featuring Cameron Vo (Vinessa Vidotto), Andre Raines (Carter Redwood), and Smitty (Eva‑Jane Willis), scramble to stitch a case together strand by strand.

The emotional center belongs to Wes, who's forced to testify about his juvenile record — he spent time in juvie, a revelation that defense teams love to spin. Things get deeply personal: Wes’s strained relationship with his incarcerated dad and the emotional scars of his mom’s overdose come under questioning. Then — WHAM — Csonka feigns bravado, cordial like “Partners end up dead,” poking Wes’s nerve.

In spite of defense tactics, the team solidifies evidence — money trails, bribed correction officers, confessions — the hallway gossip makes him sweat. Csonka is facing a juicy 30-year sentence in Hungary, no thanks to Vo, who did all the heavy lifting.

Episode 9: Big city, bigger chaos

You thought the courtroom was intense? Paris turns into a battlefield. The Fly Team closes in on Csonka’s hideout — only to find themselves ambushed. Raines is kidnapped, Vo is shot (ouch!), and Csonka slips past in a classy escape car . Now it is a global chase — Hungary, Paris… Csonka everywhere but in cuffs — and with Vo clinging to life, the fight just got that much more personal.

Knapp’s strength? Subtlety. He isn’t a caricature super-villain spouting clichés. Instead, he chisels every scene with slow-burning menace. On Reddit, fans were quick to notice the familiar vibe, saying:

“He kinda plays this role just like he did Drew… just a bad guy this time.”

and…

“He gets typecast as this character if you watch most of the shows he was in.”

Clearly, viewers aren’t just seeing the character; they see the Knapp brand — menacing yet polished villainy.

Regarding the status of his future presence in FBI: International, some sources say Csonka may not vanish quietly. His breakout arc in Episode 8 sets the stage for a full‑blown reckoning in mid‑season and beyond. Others note that his rising influence deepens the Wes–villain rivalry, promising more tension. Factor in that Episode 9 ends on a cliffhanger — Vo down, Csonka en route to Paris — the stage is primed for revenge, redemption, or perhaps a double‑cross.

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More on FBI: International: Fans, fandom, and flair

While Greg Csonka is grabbing headlines, the broader show deserves a nod. Launched in 2021 as the third entry in Dick Wolf’s FBI franchise (after FBI and FBI: Most Wanted), International delivers a fresh continental spin — with the Fly Team headquartered in Budapest but hopping from Amsterdam to Vienna and Istanbul.

Fandom-wise, the Reddit threads have been abuzz. One user captured the franchise appeal:

“Honestly as a fan of crime‑dramas I think the 3 FBI shows are easily the best outside of Law and Order. Main FBI is really good, International is good since it’s Europe based.”

They appreciate that International isn’t just a clone. It leans into unique nuances — local customs, cross‑border jurisdiction challenges, non‑English dialogue. That’s why a cunning antagonist like Csonka fits so well: A global threat must be global in reach.

FBI: International was canceled in March 2025 after four seasons — but thanks to plot threads (like Csonka’s), character arcs, and fan affection, its impact lingers. With 78 episodes under its belt and a proper arc conclusion underway, its legacy promises to survive long after its broadcast.

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Beau Knapp’s Greg Csonka in FBI: International embodies the kind of layered villain that sticks — part polished criminal, part emotional trigger. He is woven into main plotlines, shaking up Wes Mitchell’s journey, riling up the Fly Team, and energizing the franchise with European intrigue. From courtroom showdowns in Budapest to adrenaline-charged chases in Paris, Knapp’s portrayal brings gravitas, menace, and a hint of Hollywood polish.

For fans quirky about plot twists, character depth, and international flair, Csonka ticks every box. And in a show known for transcontinental crime drama, his presence adds a rich layer to the global chase. As FBI: International heads toward its finale, Csonka's unresolved arc ensures the show — and Knapp’s turn — will be talked about long after the credits roll.

Whether you root for Beau Knapp, Wes, or just fancy procedural thrills with a foreign accent, Csonka’s story is proof that even the villain can steal the show.