Season 4 Episode 13: By Right of Loneliness

In this episode, we take a look at chapters thirty-five through thirty-seven of God Emperor of Dune, in which Duncan struggles with an existential crisis before an unsympathetic Leto, the God Emperor becomes irate that Duncan won't stay away from his betrothed, Moneo comes much too close for comfort to an encounter with The Worm, and a skeptical Siona finally comes face-to-face with the God Emperor as they both succeed in getting under the other's skin - and Leto deems Siona ready for the mysterious testing.