HBO Max premiered Stuart Fails to Save the Universe, a Kevin Sussman-led spinoff that directly ties into The Big Bang Theory universe by bringing back a legacy character in a brief cameo. The series opener has an ambitious, bizarre premise and opens with a plot beat described in reviews as Gary dying in episode one. Trailers, images and posters were released ahead of the launch, and early reviews called the premiere surprisingly nostalgic and bonkers, mixing sitcom callbacks with sci‑fi adventure. The show has already earned an initial critics' score on Rotten Tomatoes and prompted cast and creator interviews and Q&As discussing the Big Bang return. Early reactions from reviewers and viewers emphasize that fans of The Big Bang Theory will recognize and likely appreciate the callbacks while the series sets up further genre-forward directions.