It’s a bit foolish to talk about good guys and bad guys in Dune: Prophecy, a series with no obvious heroes. But that also makes it one without any clear villains, too. Desmond Hart began the series as a soldier freshly returned from a battle on Arrakis with mysterious powers; by the end of the first episode, he uses them to immolate both a Bene Gesserit truthsayer and a child betrothed to Emperor Javicco Corrino’s daughter Ynez. But in the final moments of the season, we learn Desmond...