‘Stuart Fails to Save the Universe’ Producers on Episode 2’s Surprise Kaley Cuoco Cameo As an Alternate Penny

SPOILER ALERT: This story contains spoilers from “Stuart Fails to Save the Universe” Season 1 Episode 2, now streaming on HBO Max. “Stuart Fails to Save the Universe” Episode 2 was chock full of cameos and guest stars — but saved the biggest one, at least for “The Big Bang Theory” fans, until near the end…