The newest The Big Bang Theory spinoff Stuart Fails to Save the Universe is keeping fans invested by bringing actors from the original series week by week. The first episode of Stuart Fails to Save the Universe had a cameo by Kunal Nayyar as Raj Koothrappali, but in the second episode, four actors from the main series returned, including one member of the core gang. Kaley Cuoco’s Penny had a welcome return as Penny, along with a number of side characters. The spinoff revolves around Stuart Bloom (Kevin Sussman), who is tasked with saving the world along with his friend Bert (Brian Posehn), former girlfriend Denise (Lauren Lapkus) and frenemy Barry Kripke (John Ross Bowie).
