As the tension continues to build for the multiple story lines involved in the second half of the season, Holden and the protomolecule/Miller are dancing around whether Holden will give it what it wants in order to complete what Miller claims is an artifact from a long dead civilization.
I won't tell any more about what happens but there are some fantastic visuals and I think that the Expanse continues to have some of the best character writing where people are not acting purely irrational just because it is convenient for the plot. Questions are asked and motives are laid bare or shift when meeting an unexpected reality. It's a must watch episode if you love the larger lore of this show, though it is less action heavy than other episodes (not a bad thing).