‘Stuart Fails to Save the Universe’ Cast Guide: Every Returning and New Actor in ‘The Big Band Theory’ Spinoff

Published 07/17/2026, 4:56 PM EDT

Kevin Sussman at the German Comic Con Dortmund Spring Edition 2022 at the Messehalle Dortmund, 24 04 2022 Foto:xN.xKubelkax xFuturexImage

For years, fans have been clamoring for a true Big Bang Theory spinoff, but never in their dreams would they have anticipated that they would be surprised with Stuart Fails to Save the Universe. Kevin Sussman plays Stuart again in the upcoming series, which is created by Chuck Lorre, Zak Penn, and Bill Prady. Stuart is an awkward and angsty comic book shop proprietor who frequently hosts numerous iconic The Big Bang Theory sequences.

With the release of the spinoff inching closer and closer, The Big Bang Theory enthusiasts are dying to know who else will be a part of Stuart’s adventure.

Meet the talent attached to Stuart Fails to Save the Universe

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Kevin Sussman: Sussman plays Stuart Bloom, the owner of a comic book business entrusted with bringing reality back following a multiverse accident. In the upcoming series, he also plays many alternate versions of Stuart.

Brian Posehn: Posehn was the adorable and sweet geologist, Bert Kibbler, from the original series. He is Stuart’s best friend and will be his most trusted ally in this multiversal adventure.

Lauren Lapkus: Lapkus played Stuart’s comic book expert girlfriend, Denise, in the original series, but now their relationship dynamics have changed. Denise apparently has a new boyfriend now, even though she will be helping Stuart in his attempt to restore order in this multiversal chaos.

John Ross Bowie: Bowie portrays quantum physicist Barry Kripke in both his original role and Supreme Ruler Barry Kripke in an alternate dimension.   

July 21, 2017 - San Diego, US - Day 2 of Comic Con .Even more people turned out today..The Big Bang Theory Special Video Presentation and Q&A.The Big Bang Theory returns to San Diego to take you inside the biggest moments of season 10 and behind the scenes of TV s 1 comedy for a special 10th anniversary panel.Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik & Kevin Sussman..Seen here: San Diego US - ZUMAf22_ 20170721_zaf_f22_160

Additional cast includes Josh Brener and Ryan Cartwright, who will not be extending their cameo roles from the first sitcom. Rather, Cartwright will now portray a frequent customer of Stuart's store and a comic book fanatic. Trevor is the character that Brener will portray. Brener portrayed Stuart's friend Dale on The Big Bang Theory. Tommy Walker, who will portray Gary, a new romantic interest for Lapkus' Denise, is a new addition to the universe.

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The new and returning faces will be a part of an epic sci-fi adventure led by the most unlikely hero.

The plot of Stuart Fails to Save the Universe

Stuart Fails to Save the Universe follows our beloved comic book store owner, Stuart Bloom, who accidentally initiates a multiverse disaster by breaking a device created by Sheldon and Leonard. When the mistake causes an Armageddon across realities, Stuart is left to fix the damage.

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July 21, 2017 - San Diego, US - Day 2 of Comic Con .Even more people turned out today..The Big Bang Theory Special Video Presentation and Q&A.The Big Bang Theory returns to San Diego to take you inside the biggest moments of season 10 and behind the scenes of TV s 1 comedy for a special 10th anniversary panel.Johnny Galecki, Kaley Cuoco, Kunal Nayyar, Mayim Bialik & Kevin Sussman..Seen here:Kunal Nayyar,Kevin Sussman San Diego US - ZUMAf22_ 20170721_zaf_f22_189

To make amends, he teams up with his friend Bert, a geologist, his love interest Denise, and the usually annoying but intelligent Barry Kripke. However, even with the help, Stuart's path is far from simple, and there is a lot of noise along the way. The new Big Bang Theory spinoff releases on July 23 and can be streamed on HBO Max.

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What are your expectations for Stuart’s new adventure? Share your thoughts.

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Harshit Kumar

568 articles

With nearly two years of experience in content writing, primarily in sports, Harshit has now ventured into the alluring alleys of Hollywood at NetflixJunkie. A true pop-culture fanatic and a certified cheat code for movie trivia night, he brings infectious enthusiasm to every conversation. He has strong opinions about everything from uplifting superhero spectacles to gripping psychological crime dramas, and he is never shy about backing them up.

Edited By: Hriddhi Maitra

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