Full spoilers follow for Star Trek: Discovery Season 3, Episode 8. Read our review of Discovery Season 3, Episode 7 for where we left off. [poilib element="accentDivider"] In this week’s Discovery, “The Sanctuary,” Book (David Ajala) gets a visit to his home planet -- and his troubled past -- while Dr. Culber (Wilson Cruz) tries to figure out what exactly is going on with the afflicted Georgiou (Michelle Yeoh).