HBO Max unveiled the first teaser trailer for the “Big Bang Theory” spinoff “Stuart Fails to Save the Universe.” The teaser was released during the Warner Bros. Discovery upfront presentation to advertisers in New York on Monday.

For nearly 20 years, The Big Bang Theory universe has been on TV near-constantly, either with its original show, or with spin-offs Young Sheldon and Georgie & Mandy’s First Marriage.

"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," according to its offi...