SPOILER ALERT: This story contains spoilers from “Stuart Fails to Save the Universe” Season 1 Episode 3, now streaming on HBO Max. Things get witchy in Episode 3 of “Stuart Fails to Save the Universe,” and a scary, 60-foot Bernadette (Melissa Raush) makes a guest appearance. That’s the first sign that in this universe, Bert really is a wizard with magical powers. Popular on VarietyKripke (John Ross Bowie), who had seen Bert on the stake, makes his way back to the store. At the same time, Bernadette makes her potion and turns into a 60-foot monster, destroying Pasadena.