WARNING: This thread WILL contain unhidden spoilers for this episode and every episode before it. You are allowed to talk about future episodes of the series, but put ANY information that comes after this episode behind spoiler tags.
The Orville season 1, episode 12 "Mad Idolatry"
Written by Seth MacFarlane, directed by Brannon Braga.
Commander Grayson, Lieutenant Malloy, and Isaac take a shuttle to an area near an uncharted star to investigate a spacial anomaly. Suddenly, the anomaly becomes an entire planet and the shuttle barely lands in one piece. While exploring the surface, Grayson discovers the planet is home to primitive humanoids. Despite Union regulation to stay out of sight, she gets spotted and has to heal a little girl who cuts her head on a rock in response to being startled. Thinking nothing of it, Captain Mercer writes the infraction off just as the planet suddenly disappears. When it reappears 11 days later, 700 years have elapsed on the surface and Grayson's simple act of kindness has evolved into an entire religion in her name.
Originally released: 7 December 2017
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That's it for season 1. Coming next week: Bortus finally goes to the bathroom.
Oh, I forgot to mention, a cut scene from this episode would have involved an in-universe puppet show where the First Healing was re-enacted for children. It was cut because they didn't feel it worked within the episode, but the puppeteers did show off the Kelly and ... head-cut-girl puppets on Instagram (Imginn mirror link). It's a shame these weren't ever on-screen, they look great. I've attached one of the Instagram photos to this comment.