Stuart Fails To Save The Universe Team Breaks Down [Spoiler]'s Surprise Return And Grim Fate In Episode 1 Of The Big Bang Theory Spin-Off - TVLine

It didn't take long for HBO Max's "Stuart Fails to Save the Universe" to bring back a member of the original cast of "The Big Bang Theory."

Twelve minutes into the July 23 premiere, Stuart Bloom (Kevin Sussman), his ex-girlfriend Denise (Lauren Lapkus), and geologist Bert Kibbler (Brian Posehn) are reunited with Rajesh Koothrappali (Kunal Nayyar).

Or, at least, an alternate-universe version of the Caltech astrophysicist.

By this point in Episode 1, Stuart has already been visited by Stuart Prime, who tells him that the post-apocalyptic wasteland he inhabits — along with every other alternate universe — can be avoided if he repairs the quantum interference device built by Leonard, Sheldon, and Howard in the original universe. Thankfully, Raj, who's been held prisoner at Caltech for years by Grand Caliph Barry Kripke (John Ross Bowie), has done the math and knows how to make the world right again.