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July 23, 2026


Stuart Fails to Save the Universe: A new chapter in the "Big Bang Theory" universe has arrived. 

    
Kevin Sussman, Lauren Lapkus, Brian Posehn, and John Ross Bowie holding a multiverse machine in Stuart Fails to Save the Universe.

"Stuart Fails to Save the Universe" pushes the franchise into unfamiliar territory. 


Critics, however, are divided on whether the shift pays off. The show's Rotten Tomatoes score also lands below that of "Young Sheldon."


Critics Weigh In on the New Spin-Off

"Stuart Fails to Save the Universe" currently holds a 64% score on Rotten Tomatoes. That places it in mixed-reception territory among critics. 


The number also falls short of "Young Sheldon's" stronger debut score.


Several reviewers say the new series stretches too far beyond the franchise's roots. The original "Big Bang Theory" thrived on small, relatable moments. 


This spin-off, by contrast, leans heavily into multiverse storytelling and science fiction. 


Critics argue that shift pulls the show away from the slice-of-life comedy that made the franchise a hit in the first place.


ScreenRant's Ana Dumaraog noted that the events of the new series carry little weight for longtime fans of the original sitcom, since nothing in the spin-off reshapes how viewers see the show that started it all.


The Seattle Times' Chase Hutchinson offered a similar take, suggesting that despite jumping between numerous alternate universes, the series never lands on one that feels essential.


A Tonal Departure From the Franchise

"Stuart Fails to Save the Universe" breaks from its predecessors in style as much as substance. 


It blends sitcom humor with science fiction, action sequences, and multiverse-hopping plotlines. 


The creative team set out to chart new territory for the franchise, even at the risk of alienating longtime fans.


Premiere Details and Cast

The series debuts on HBO Max on July 23. It follows Stuart Bloom, a comic book store owner, who triggers a multiverse crisis using an invention built by Sheldon and Leonard. 


Stuart then teams up with Denise, Bert, and Barry Kripke to try to undo the damage.


The cast includes Kevin Sussman, Lauren Lapkus, Brian Posehn, and John Ross Bowie. 

Chuck Lorre, Bill Prady, and Zak Penn — the team behind the franchise's most recent installments — created the series. 


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