Warning! The following contains spoilers for the Stuart Fails To Save The Universe episode "Spoiler Alert: Bert Is Magic." Stream the episode with an HBO Max subscription, and read at your own risk!It was another banger episode for Stuart Fails To Save The Universe, as the team found themselves in a world in which magic was real and scientists were burned at the stake. Fortunately, Bert managed to escape his predicament he was in, and turned out to be one of the most powerful people in the universe, which came in handy when the crew encountered Wil Wheaton. Wheaton's return from The Big Bang Theory was already revealed ahead of Stuart Fails To Save The Universe, but as with the case with the last surprise guest star, there was one character we didn't know would show up. Let's get into both below, and have a "hell" of a time breaking it down. Wil Wheaton Returned And Almost Killed Stuart With A FireballWil Wheaton went from being someone who actively avoided being on The Big Bang Theory to one of its most memorable guest stars during its run. It would've felt weird if he wasn't in Stuart Fails To Save The Universe, so I'm glad he had a cameo as the enforcer of the Magic Guild. Stuart violated the rules for helping a demon get her magic back, which we'll get into later. Bert ended up doing battle with Wheaton, and after exchanging the devil horns and Vulcan salute, Bert ended up eviscerating Wheaton's mage. The good news is, that was just the Wheaton of one universe, so hopefully we'll see him pop up again in the future like other characters who have died. Melissa Rausch Returned As Bernadette, And Became A Literal DemonMelissa Rausch was the latest person from The Big Bang Theory to return as their beloved character, but this wasn't like the Bernadette Wolowitz we remembered. Sure, she always had some edge to her, but in no universe would I have guessed she was a literal demon. More On Stuart Fails To Save The UniverseI'm Applauding Stuart Fails To Save The Universe For Three Ways It Reminds Me Of The SimpsonsBeyond the fact that she was from hell, it was the same Bernadette fans know and love with all her special quirks. Unfortunately, she had no idea who Howard was, which meant the team was no closer to finding anyone familiar enough with the Quantum device to fix it or figure out how Stuart needed to save the universe. She did want the device, however, but fortunately, they were able to get out of that universe before things got too bad. Unfortunately, Stuart was transported from that directly into what appears to be a behavioral health facility, with the implication being that he's there because he concocted this entire scenario in his mind. Is that the case? I guess we'll find out as Stuart Fails To Save The Universe continues on HBO Max with new episodes on Thursdays at 9:00 p.m. ET. I'm loving these episodes so far, and I can't wait to see who the next big cameo will be.