“The Big Bang Theory,” about a group of nerdy friends ran from 2007 to May 2019. The first spinoff, “Young Sheldon,” ran for seven seasons and concluded last year. “Georgie & Mandy’s First Marriage,” will debut its second season in the fall. Warner Bros. and HBO Max are owned by CNN’s parent company.

As the first Big Bang Theory spin-off that isn't a prequel, Stuart Fails to Save the Universe represents a big shift from the other spin-offs, both of which are set well before the events of The Big Bang Theory.

The official synopsis for Stuart Fails to Save the Universe proves the spinoff will bring back The Big Bang Theory's characters, but there's a catch.