The finale of "Stuart Fails to Save the Universe" (SFtStU) brought back elements that reminded fans of "The Big Bang Theory" (TBBT), according to multiple reports. In this episode, the main characters—Stuart (Kevin Sussman), Denise (Lauren Lapkus), Kripke (John Ross Bowie), and Bert (Brian Posehn)—were transported to an alternate universe where other versions of themselves were filming the HBO Max show in front of a live studio audience. This marked a notable departure from the usual setup of SFtStU, as the episode did not feature Sheldon (Jim Parsons) and Leonard (Johnny Galecki), who had previously built the multiversal machine that Stuart has been responsible for breaking this season. The use of a live studio audience was a unique occurrence for SFtStU. John Ross Bowie, who plays Kripke, noted that the experience felt like a blend of the original show and something completely different. Brian Posehn, who portrays Bert, added that being on Stage 25 at the Warner Bros. studio lot in Burbank, California—officially named "The Big Bang Theory Stage"—was surreal. This stage is one of only five on the lot named after a show, with others including "The Ellen DeGeneres Show," "E.R.," "Friends," and "Two and a Half Men." The stage is also part of the public tour of the studio lot. Both Bowie and Posehn described the experience as "trippy and fun." The episode was seen as the closest SFtStU has come to reviving the spirit of TBBT since 2019. The use of a sitcom studio multicam format—last seen in TBBT—was highlighted as an Easter egg for fans of the original series. This format, which involves multiple cameras capturing live action, was a nostalgic nod to the earlier show and added to the overall connection between the two series. The connection to TBBT was further emphasized by both the location and the format of the episode. By bringing back the live audience and the multicam setup, the creators of SFtStU paid tribute to the legacy of TBBT while also pushing the boundaries of their own show. Fans appreciated the homage, seeing it as a clever and creative way to bridge the gap between the two series.