New 'Big Bang Theory' spinoff confirmed with multiverse plot featuring Stuart Bloom and returning cast

A new 'Big Bang Theory' spinoff, 'Stuart Fails to Save the Universe', has been confirmed with a multiverse plot.

A new spinoff from The Big Bang Theory has been confirmed, with the upcoming series set to feature Stuart Bloom and explore a multiverse storyline.

The Big Bang Theory first aired in 2007 and ran for 12 seasons before concluding. The franchise continued with spinoffs including Young Sheldon, which aired for seven seasons, and Georgie & Mandy’s First Marriage, which began in 2024 and has been renewed for a second season. 

In 2023, reports emerged of a potential spinoff involving comic book store owner Stuart Bloom. Two years later, the project has been officially greenlit at HBO Max, as reported by Variety.

The spinoff is titled Stuart Fails to Save the Universe and will see Kevin Sussman return as Stuart. Lauren Lapkus, Brian Posehn, and John Ross Bowie will also return in their roles as Denise, Bert, and Barry Kripke.

The official synopsis states: “Comic book store owner Stuart Bloom is tasked with restoring reality after he breaks a device built by Sheldon and Leonard, accidentally bringing about a multiverse Armageddon. Stuart is aided in this quest by his girlfriend Denise, geologist friend Bert, and quantum physicist/all-around pain in the ass Barry Kripke. Along the way, they meet alternate-universe versions of characters we’ve come to know and love from The Big Bang Theory. As the title implies, things don’t go well.”

Screenwriter Zak Penn described the series as the type of show “the characters from Big Bang Theory would watch.” Co-creator Chuck Lorre added, “There’s a lot of CGI.”

No official release date has been confirmed, though the spinoff is expected to air on HBO Max in 2026.