All About “Stuart Fails to Save the Universe”, the Latest “Big Bang Theory” Spinoff Centered on Stuart Bloom

Christopher RudolphMon, April 27, 2026 at 5:30 PM UTC

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John Ross Bowie, Lauren Lapkus, Kevin Sussman and Brian Posehn in 'Stuart Fails to Save the Universe'Credit: HBO Max -

Stuart Fails to Save the Universe is the latest spinoff of The Big Bang Theory

The series stars Kevin Sussman as Stuart Bloom, reprising his role from the long-running sitcom

Stuart Fails to Save the Universe will premiere this summer

The world of The Big Bang Theory is blending sci-fi with sitcom in the upcoming series Stuart Fails to Save the Universe.

The latest entry in the franchise, Stuart Fails to Save the Universe, joins other Big Bang Theory series, including Young Sheldon and Georgie & Mandy's First Marriage. Young Sheldon ended in 2024 after seven seasons, and season 2 of Georgie & Mandy's First Marriage is set to conclude in May 2026, but it has already been renewed for an upcoming third season, per Deadline. It has been seven years since The Big Bang Theory left the air in 2019.

On April 26, HBO Max unveiled a first look at the upcoming show during a panel at CCXP Mexico City. The series is expected to stream on the platform in the summer of 2026.

Here's everything to know about the latest Big Bang Theory spinoff, Stuart Fails to Save the Universe.

What is Stuart Fails to Save the Universe about?

John Ross Bowie, Lauren Lapkus, Kevin Sussman and Brian Posehn in 'Stuart Fails to Save the Universe'Credit: HBO Max

Stuart Fails to Save the Universe is bringing multiverse madness to the Big Bang Theory universe.

The spinoff follows comic book store owner Stuart Bloom (Kevin Sussman), who "is tasked with restoring reality after he breaks a device built by Sheldon and Leonard, accidentally bringing about a multiverse Armageddon," per the official logline.

Stuart is accompanied by his girlfriend Denise (Lauren Lapkus) and his friends as they run into "alternate-universe versions" of beloved characters from The Big Bang Theory.

"As the title implies, things don’t go well," ends the synopsis.

Who is in the cast of Stuart Fails to Save the Universe?

John Ross Bowie, Lauren Lapkus, Kevin Sussman, Brian Posehn in 'Stuart Fails to Save the Universe'Credit: HBO Max

Sussman is reprising his role of Stuart, which he played on seasons 2-12 of the original Big Bang Theory. Other Big Bang Theory cast members returning are Lapkus as Denise, Stuart's girlfriend, Brian Posehn as his geologist friend Bert and John Ross Bowie as "quantum physicist/all-around pain in the ass" Barry Kripke.

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Since "alternative-universe versions" of Big Bang Theory characters are expected to show up, other actors from the sitcom could make an appearance.

In a July 2025 interview with TV Line, when Big Bang Theory franchise co-creator Chuck Lorre was asked if Jim Parsons and Johnny Galecki — who played Sheldon and Leonard on the flagship series — would be reprising their characters for Stuart Fails to Save the Universe. Lorre said, "I cannot speak to that."

"That is a closely guarded piece of information that, you know," he teased. "I've taken a blood oath regarding."

Most recently, Parsons said he wouldn't come back for a reboot during an April 2026 appearance on The View. “I don’t believe I would do a reboot,” he said, adding of his famous character, “I can’t say I miss him, partly because, especially 12 years on a TV show where they’re writing for this specific actor, there’s a lot of me in that. Not the genius part, but there’s a lot of me in that.”

While not a cast member, it was also revealed at the CCXP Mexico City panel that Danny Elfman created the original theme music for the upcoming series.

When does Stuart Fails to Save the Universe premiere?

Brain Posehn, Kevin Sussman and Lauren Lapkus in 'Stuart Fails To Save The Universe'Credit: Colin Remas Brown/HBO Max

Stuart Fails to Save the Universe will debut in July 2026 on HBO Max, but an exact premiere date has not been announced.

In February 2026, Lorre spoke with PEOPLE about Stuart Fails to Save the Universe, calling it "a science fiction action-adventure comedy."

“We just finished principal photography and I'm pretty excited about it. It's a big swing," he continued. “I think it will be revered or reviled. I'm not sure which.”

Where can I watch Stuart Fails to Save the Universe?

Lauren Lapkus and Kevin Sussman in 'Stuart Fails To Save The Universe'Credit: Colin Remas Brown/HBO Max

Stuart Fails to Save the Universe will be available to stream on HBO Max.

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Source: “AOL Entertainment”