HBO Max premiered Stuart Fails to Save the Universe, a Kevin Sussman spinoff that pushes a Big Bang Theory supporting character into a new sci-fi comedy. Critics describe the premiere as surprisingly ambitious and delightfully bizarre, and HBO Max has rolled out trailers, images and posters for the series. The first episode includes a brief legacy-character cameo tied to The Big Bang Theory universe; reviewers and press note that the cameoed character, Gary, dies in Episode 1. Rotten Tomatoes has published an initial critics' score for the series. Early audience responses are mixed but many viewers praised the episode’s bonkers concept and dark comedic tone.