Development In April 2023, it was announced that an untitled
The Big Bang Theory spin-off was in early development at
Max, created by
The Big Bang Theory co-creator and executive producer,
Chuck Lorre. The spin-off series was formally announced at the 2023
Warner Bros. Discovery upfront presentation by
HBO and Max CEO and chairman, Casey Bloys.
Robert Duncan McNeill will be directing episodes. In October 2024, it was announced that the spin-off would focus on
Stuart Bloom, the owner of the comic book store, Comic Center, on
The Big Bang Theory. In March 2025, it was announced that the spin-off would be titled
Stuart Fails to Save the Universe. In July 2025,
HBO Max officially gave
Stuart Fails to Save the Universe a series order. In February 2026, Lorre described the series as a "science fiction action-adventure comedy", and said of its creation, "I just wanted to do something that challenged me, that I was uncomfortable and in unfamiliar territory and the special effects stuff, the computer graphics, all those things. [...] Most of my career has been two people sit on a couch and talk."
Casting In October 2024, it was announced that
Kevin Sussman,
Brian Posehn, and
Lauren Lapkus, who played Stuart Bloom,
Bert Kibbler, and
Denise, respectively, on
The Big Bang Theory would be reprising their roles from the series, and had also signed
talent holding deals with
Warner Bros. Television for the spin-off. In August 2025,
Ryan Cartwright,
Josh Brener, and Tommy Walker joined the cast as recurring guest stars.
Filming The series began filming in September 2025, and wrapped in February 2026. ==Release==