In one of the most unexpected casting twists of the season, Kevin Sussman, best known for his quirky role as Stuart on The Big Bang Theory, will appear in the highly anticipated Season 7 finale of CBS’s FBI—but fans shouldn’t expect laughs this time.
Sussman is set to portray a character that is both emotionally complex and morally ambiguous, marking a striking departure from his previous comedic work. His appearance is being kept tightly under wraps by producers, but early reports suggest that his role will be central to the season’s final case, possibly even tying into the future of the FBI universe.
🕵️ Who Is Kevin Sussman Playing?
While CBS has not released the full character name or backstory, showrunner Mike Weiss teased that Sussman’s role is “not what viewers will expect.”
“This is a very grounded, dramatic part,” Weiss told TV Line. “Kevin brings nuance and quiet intensity to the role—he completely transforms.”
Sources say Sussman will play a disgraced former government contractor with knowledge of a classified cyber-weapon system. The FBI team is pulled into a race against time when Sussman’s character goes missing just days before a major intelligence leak threatens national security.
What’s more, the case may be linked to shadow operatives introduced in FBI: CIA, the franchise’s upcoming spinoff launching in Fall 2025.
🔄 A Role That May Continue?
There is already speculation that Sussman’s role is not just a one-off. According to behind-the-scenes chatter, the finale sets up an arc that could continue into FBI Season 8 — or even FBI: CIA.
“This character knows too much and trusts too few,” said a CBS insider. “Depending on how the finale plays out, he could reappear as a wildcard in future storylines.”
If true, this would mark Sussman’s first major role in a dramatic franchise since his early appearances on Ugly Betty and Burn Notice.
🎬 What to Expect in the Finale
Titled “Zero Protocol,” the Season 7 finale is described as a tense, multilayered episode involving:
- A massive data breach with roots inside a U.S. intelligence program
- OA and Maggie going undercover in a high-security corporate facility
- Jubal facing pressure from upper-level government contacts to bury key parts of the investigation
- The reveal of a deep mole inside a federal agency, possibly with ties to the CIA
Sussman’s character is expected to appear midway through the episode and play a pivotal role in either stopping or enabling the breach.
💬 Fan & Industry Reaction
The casting announcement has already lit up social media, with many fans expressing surprise and curiosity.
“Wait—Stuart from Big Bang Theory is gonna be in FBI? This I have to see,” one user posted on X.
Television critics have praised the choice as inspired. Emily Nussbaum, TV columnist for New York Magazine, wrote:
“Casting Kevin Sussman in a dramatic thriller is unexpected, but smart. He’s always had untapped dramatic chops.”
📆 When and Where to Watch
- Episode Title: “Zero Protocol”
- Air Date: July 22, 2025
- Network: CBS
- Streaming: Available next-day on Paramount+
- Guest Star: Kevin Sussman as “Alex Doran” (working name)
- Director: Alex Chapple
- Written by: Mike Weiss & Claire Demorest
🧩 Is This the Beginning of Something Bigger?
With FBI undergoing a creative shift under new showrunner Mike Weiss, and FBI: CIA on the horizon, Sussman’s character may become a key connective thread in the larger FBI universe. Whether he returns as an ally, a threat, or something in between remains to be seen.
