“The Sky Circle Celebration” episode has always been my least favorite part of the franchise for introducing religion into the universe. And then it made Petrie absolutely insufferable as a sun worshipper, constantly shoving his beliefs down his friends’ throats, and then the narrative sided with him and the moral was that Cera was in the wrong for being a buzzkill by not worshipping the sun like all her friends did. I guess it hits too close to home as someone who grew up atheist in a highly-religious community, I had to hide my true beliefs from everyone and this episode would have made me feel awful if I’d seen it during that point of my life.