HBO Max has released the official teaser for Stuart Fails to Save the Universe, the upcoming spin-off of The Big Bang Theory centered on comic book store owner Stuart Bloom, played by Kevin Sussman.

The trailer was unveiled Wednesday by stars Sussman, Lauren Lapkus, Brian Posehn and John Ross Bowie during Warner Bros. Discovery’s Upfront presentation in New York. HBO Max also confirmed that the 10-episode series will premiere Thursday, July 23 at 9 p.m. ET, with new episodes dropping weekly on Thursdays.

The single-camera comedy series follows Stuart after he accidentally breaks a device built by Sheldon and Leonard, setting off a multiverse catastrophe. To restore reality, Stuart teams up with his girlfriend Denise (Lapkus), geologist Bert (Posehn), and the perpetually abrasive quantum physicist Barry Kripke (Bowie). Their mission brings them face to face with alternate-universe versions of familiar Big Bang Theory characters, though, as the title suggests, Stuart’s rescue efforts do not exactly go smoothly.

The teaser opens with a hooded figure entering the Comic Center of Pasadena, only to reveal himself as Bert. When Stuart asks what it is like outside, the trailer cuts to flashes of apocalyptic chaos before Bert deadpans, “I think there’s room for improvement.” Other footage teases giant bugs, desolate war zones, a supreme ruler of Southern Pasadena and a wormhole, while one version of Stuart quickly tries to explain how this “apocalyptic nightmare” never has to happen.

At one point, Stuart finds a Stuart Fails to Save the Universe comic book in his own store, featuring a panel showing Sheldon, Leonard and Howard with the “Vari-state Quantum Entanglement” device that appears to have caused the crisis.

Stuart Fails to Save the Universe is created, written and executive produced by The Big Bang Theory co-creators Chuck Lorre and Bill Prady and screenwriter Zak Penn, whose credits include The Avengers and Ready Player One.