Kevin Sussman leads a spin-off that never quite matches the show it borrows from. “Stuart Fails to Save the Universe” puts Stuart Bloom at the center of a multiverse crisis, and the premise is better than the execution.
The series follows Stuart after he accidentally damages a device created by Sheldon, Leonard and Howard. That damage sets off a “multiverse armageddon,” and Stuart must find a quantum-interference device to fix it. Along the way, he meets versions of himself and his friends across different realities, played by the returning cast of Lauren Lapkus as Denise, Brian Posehn as Bert Kibbler and John Ross Bowie as Barry Kripke.
The humor leans on repetition and sight gags rather than wit. Sussman carries the show with a steady, unassuming presence, but the jokes around him often land flat. Lapkus, Posehn and Bowie get less to do than they did in the original series, and their roles feel diminished rather than expanded.
The show’s biggest problem is pacing. Episodes stretch ideas thin over ten installments, and the stakes, while stated clearly, rarely feel urgent. The multiverse threat exists mostly as a framing device for Stuart to wander through alternate versions of his life. The show is at its best when it focuses on Stuart’s relationships with his friends, and at its worst when it gets lost in exposition about quantum physics.
| Episode | Date |
|---|---|
| Premiere | 2026-07-23 |
| Final episode | 2026-09-24 |
The show was renewed for a second season in August 2026, and the announcement came as a surprise given how thin the first batch felt. Casting announcements in 2024 and 2025 brought back the original trio, with Ryan Cartwright, Josh Brener and Tommy Walker joining as recurring guest stars in August 2025. Their roles remain unclear from the available information.
“Stuart Fails to Save the Universe” is a competent, safe spin-off that fails to capture the spark that made the original work. Sussman’s performance holds it together, but the material beneath him is thinner than the Big Bang Theory ever was. The show earns a 6.2 out of 10, a middling score for a show that should have been aiming higher.
Trailer, via HBO Max.
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