Dune: Part Two is a very, very long movie. And yet there are still key things missing from the book. Alia, Paul’s sister, is never born (though she’s visible as a fetus and, briefly, as a very famous star). Paul never teaches the Fremen the Weirding Way. A major character we won’t reveal is offed in a different fashion. And where’s Thufir Hawat, the Mentat played in the first by Stephen McKinley Henderson? Thufir is one of the survivors of the Harkonen assault on House Atreides, and yet he’s nowhere to be seen in Part Two. There’s a reason for his absence, says director/co-writer Denis Villeneuve.