For John Ross Bowie, returning as Barry Kripke in Stuart Fails to Save the Universe was more than another appearance by a familiar Big Bang Theory character. This time, the longtime antagonist is part of the action full time—and audiences are finally getting to know what drives him.

During his conversation with Pop Culture Unplugged w/ Elias, Bowie discussed learning that Kripke would join the HBO Max spinoff, discovering the show’s post-apocalyptic multiverse and exploring a version of Barry with real goals, obstacles and relationships.

“To get the call that I was going to be not only coming back, but coming back full time was mind-blowing.” John Ross Bowie

Bringing Barry Kripke back

When the project was initially announced with Kevin Sussman, Lauren Lapkus and Brian Posehn, Bowie admitted that he spent a day or two feeling disappointed that Kripke was not among the returning characters. He still believed the producers might eventually find a way to include him, but he never expected the opportunity to be this substantial.

Once the call came, Bowie did not need to be convinced. The creative team explained that Kripke would function like Doctor Smith in the original Lost in Space: an in-house irritant who remains close to the heroes while frequently making their problems worse.

The show’s much larger scope was apparent from the first page. Bowie recalled that the opening script began with the scene heading “exterior post-apocalyptic hellscape,” immediately pulling him into the new adventure.

“I was like, ‘This is how you start a script. This is wonderful.’” John Ross Bowie

A more complete version of Kripke

On The Big Bang Theory, Kripke would arrive every few months, antagonize Sheldon Cooper and disappear until the group needed another dose of his uniquely abrasive personality. Stuart Fails to Save the Universe keeps Barry recognizable while giving Bowie much more to play.

Bowie explained that the series gives Kripke genuine character arcs, personal goals and obstacles. Although this is technically the same Barry viewers already know, the audience now sees him operating inside a world with greater depth.

“He has real arcs and he has goals, and he has things he wants, and he has things that are getting in his way. He’s a fully fleshed-out character.” John Ross Bowie

Watch the full interview

John Ross Bowie speaks with Pop Culture Unplugged w/ Elias about returning as Barry Kripke in HBO Max’s Stuart Fails to Save the Universe.

The following section contains spoilers for the opening episodes of Stuart Fails to Save the Universe.

The moment Barry shoots Raj

One of the show’s biggest early shocks arrives when Barry shoots Raj in the back. Bowie understood why the moment immediately sparked a strong response from viewers, describing Raj as one of the most likable and beloved characters in the history of The Big Bang Theory.

For Bowie, carrying out the scene was difficult even within the exaggerated world of the series. He was relieved when footage from the rest of the season showed that Raj returns in another universe.

“To shoot this incredibly vulnerable character in the back was a real—it was not my favorite thing to do.” John Ross Bowie on Barry shooting Raj

Bowie also revealed that Kripke eventually gives a “mathematically sound rationalization” for his decision. Whether fans accept Barry’s logic remains to be seen, but the explanation sounds perfectly suited to a character capable of defending almost anything with scientific confidence.

Finding a team—and an unexpected friendship

Kripke has never been known for working well with others, but the new series leaves him with little choice. Bowie teased that Barry gradually becomes more of a team player as the season progresses, while the other characters slowly become more willing to tolerate him.

A particularly meaningful connection develops between Kripke and Bert Kibbler. Bowie described their season-long arc as surprisingly sweet, something made more special by his longstanding friendship with Posehn. Bowie has admired Posehn’s work for 30 years and has known him personally for nearly 25.

That real connection extends across the cast. Bowie praised Sussman, Lapkus and Posehn as experienced actors who all understood how rare it was to move from supporting roles to the center of a series. Their shared gratitude created an unusually positive working environment.

“There wasn’t a moment where we took it for granted. There wasn’t a moment where it felt like we were getting entitled.” John Ross Bowie

Teasing Kripke’s multiverse journey

The multiverse creates opportunities to encounter alternate versions of familiar characters, but Bowie was careful not to reveal whether viewers will meet another Barry. Instead, he offered a simple suggestion: keep watching.

He added that “literal dimensionality” is brought to Kripke as the ten-episode season continues. The carefully chosen words hint that there is much more ahead for Barry without giving away where the story will take him.

Bowie also said the cast had not yet heard whether the series would return for a second season, though the multiverse leaves plenty of possibilities available if the adventure continues.

Understanding Barry after 18 years

After playing Kripke for 18 years, Bowie has a clear understanding of what his character would do with real authority. Asked what unnecessary thing Barry would ban from Caltech, he immediately chose the human resources department—giving Kripke “absolutely zero accountability” moving forward.

Bowie also imagined Barry inside another television universe and decided he would thrive in Mad Men. Kripke’s old-boy-network attitude would allow him to fit a little too comfortably inside Sterling Cooper, especially during the show’s earlier seasons.

As for whether Bowie would personally spend a day with either version of Barry, his answer was honest: probably neither. There are plenty of other characters from the Big Bang Theory universe he would choose first.

What’s next for John Ross Bowie

Beyond the multiverse, Bowie will appear in the historical drama Brink of War, centered on the 1986 nuclear summit in Reykjavík. The film stars Jeff Daniels as Ronald Reagan, Jared Harris as Mikhail Gorbachev and J.K. Simmons as George Shultz.

Bowie plays Ken Adelman, one of Reagan’s nuclear advisors. The production filmed in Iceland, including inside the house where the real summit took place, giving Bowie the opportunity to step into a very different kind of role.

Stuart Fails to Save the Universe is now streaming on HBO Max. Watch John Ross Bowie’s complete interview above and subscribe to Pop Culture Unplugged w/ Elias for more conversations with the stars of television and film.