In Dune: Part Two, a standout moment—Lady Margot Fenring applying the Gom Jabbar test to Feyd-Rautha Harkonnen on Giedi Prime—reframes what the Bene Gesserit are really after. The test that once judged Paul Atreides becomes a tool for control, a gateway to a b
The black sun of Giedi Prime makes everything look like chalk—until a birthday celebration inside a gladiator arena turns into something colder.
Feyd-Rautha Harkonnen, the heir of Baron Vladimir Harkonnen, arrives to mark his day with spectacle and worship. Yet what the scene builds so grandly doesn’t end with spectacle at all. After the psychotic birthday bash. he walks the corridors of the Harkonnen castle by himself. followed by Lady Margot Fenring (Léa Seydoux). He puts a knife to her throat and demands to know what she’s on about.
Lady Margot doesn’t flinch. She plays coy first, then quickly gets him under her control. She leads him into the guest wing—into a place he’s clearly never been—before commanding him in her chambers to kneel and place his hand on a box. The needle of the Gom Jabbar sits at his throat.
This is the same test Paul Atreides (Timothée Chalamet) faced in the first Dune movie. But here, the intention is not the same. Feyd-Rautha passes. He stays alive for the remainder of Dune: Part Two. still has both hands. and the story immediately pivots from punishment to procurement. Lady Margot reports on the test and on securing Feyd-Rautha’s Harkonnen bloodline by conceiving a girl with him for Reverend Mother Gaius Helen Mohiam (Charlotte Rampling) and Princess Irulan (Florence Pugh). who is also a Bene Gesserit. The sequence is brief, but the machinery behind it is enormous.
Feyd-Rautha’s experience is different from Paul’s because the test is being used for an opposite kind of purpose. In the first film. Reverend Mother Mohiam chastises Lady Jessica (Rebecca Ferguson) for defying her orders and conceiving a son—Paul—rather than conceiving a daughter for Duke Leto Atreides (Oscar Isaac) as planned. In Part Two, the stakes are already shaped by what Paul has become.
Paul Atreides has survived and is leading a crusade against the Empire’s dominion over Arrakis. That makes him an immediate threat to the Bene Gesserit for multiple reasons: it could disrupt the flow of spice as a commodity. and it could reestablish House Atreides as a major power in the universe. Over millennia. the Sisterhood has built influence not through open rule but through control—an empire of advisors. embedded in courts and present among ordinary people. including on remote planets like Arrakis.
The political structure of the Empire is described as similar to Middle Age fiefs, with lords and vassals. The Bene Gesserit have articulated the movements of every political player. from the smallest to the biggest. for millennia—using influence so they are present at court while also acting in everyday life. Their reach is linked to their abilities and to spice: heavier use of spice grants prescience and capabilities above those of ordinary people. enough to make even high-borns fear and respect them. including Feyd-Rautha.
But fear only gets you so far. The Bene Gesserit still needed to know who they could shape.
Lady Fenring’s mission in Giedi Prime—where she serves as Lady Margot’s driving force—was not just to pressure Feyd-Rautha physically. She needed to learn whether he could be controlled. The story makes that explicit through what happens to him and what Lady Fenring discovers. Reverend Mother Mohiam’s description of Feyd-Rautha’s driving forces centers on “desire and humiliation.” Lady Margot also frames his vulnerabilities through “sexual vulnerability.” Under her direction. he is reduced; she doesn’t have to rely on the Voice to make him comply. The result is not only survival—it is obedience delivered through pain.
That’s why this Gom Jabbar moment lands so hard. It isn’t merely about whether Feyd-Rautha can withstand a test. It’s about whether the Bene Gesserit can turn a dangerous mind into a lever.
All of it feeds back into a breeding program built to produce the Kwisatz Haderach—the man who will save humankind from stagnation and lead it into a new age of enlightenment. In this universe. the Imperium has no official religion. but people look to the Bene Gesserit as spiritual guides. with internal beliefs and rituals such as the Gom Jabbar test. The test becomes part of a larger system where eugenics is the method.
Over millennia, the Bene Gesserit have set in motion a secret breeding program between the Great Houses. Their influence crosses members of those houses until a man is born with the genetic crossing needed to become the Kwisatz Haderach. The plan. according to the story’s account. is specific: the Kwisatz Haderach is supposed to be born from a crossing between houses Atreides and Harkonnen—an Atreides female and a Harkonnen male.
But Lady Jessica’s decision to bear Duke Leto a son thwarts the plan. House Harkonnen’s genetic line is left in danger. That gives Lady Fenring’s mission another purpose: to secure Feyd-Rautha’s genetic line by bearing his daughter. ensuring continuity of the program. The narrative also ties this to how many Bene Gesserit act as concubines to great houses.
Lady Jessica herself never married Duke Leto—she was only his concubine. Her past. meant to remain secret. is part of why the plan shifted again: she never knew she was the daughter of Baron Vladimir Harkonnen. so her having a son made the Atreides-Harkonnen crossing happen one generation earlier. placing Paul in the position the Bene Gesserit had been aiming for as the Kwisatz Haderach.
The movie’s shift from book details is part of why this scene reads as so purposeful rather than merely dramatic. In the novel. Lady Margot Fenring is present. loyal to the Bene Gesserit. and tied to Count Hasimir Fenring. who is a close advisor to the Emperor. In the books. her direct involvement is smaller; she is mostly the wife of Count Hasimir Fenring. the pair who supervises the change of power from House Harkonnen to House Atreides on Arrakis. and she leaves notes to Lady Jessica warning her of the plot to destroy her family. In Dune: Part Two, however, the story expands her on-screen role.
Count Fenring was supposed to be played by Tim Blake Nelson in Dune: Part Two. and scenes were recorded but ended up cut from the final version. Even so, the movie keeps Lady Margot as a crucial part of the Bene Gesserit breeding program. In the book. her husband Count Fenring was once a Kwisatz Haderach prospect but can’t have children of his own. He knows about her missions and is often complicit. The books don’t mention what happens to the child afterward. and House Harkonnen continues with a diminished and only indirect involvement in the main plot.
The point of showing what happens—of watching the test applied and the report delivered—is that it turns the Bene Gesserit from distant movers into immediate operators. Lady Margot later provides a firsthand report of her findings in an “objective” fashion that focuses on Feyd-Rautha as the object of her mission. In other words, the scene doesn’t ask you to interpret her intentions. It lets the procedure do the talking.
Denis Villeneuve’s Dune: Part Two runs 167 minutes and was released February 27, 2024. Directed by Denis Villeneuve, and written by Denis Villeneuve, Jon Spaihts, and Frank Herbert, it takes a familiar ritual and makes it feel newly personal.
When the Gom Jabbar needle touches Feyd-Rautha’s throat, it’s not just a test of survival.
It’s a measure of whether power can be manufactured—whether a prophecy can be steered, a bloodline can be secured, and a man can be reduced to the exact shape the Bene Gesserit need next.
Dune: Part Two Gom Jabbar test Bene Gesserit Lady Margot Fenring Feyd-Rautha Harkonnen Paul Atreides Giedi Prime Reverend Mother Gaius Helen Mohiam Irulan Kwisatz Haderach eugenics spice