technology-and-subterfuge

In this chapter, Duke Leto Atreides discovers the smuggler Tuek dead and the Fremen housekeeper Mapes gravely wounded, signaling a betrayal within his household. He is then incapacitated by a paralyzing dart fired by Dr. Yueh, who reveals his treacherous plan to use Leto as a pawn to assassinate Baron Harkonnen while promising to save Leto's son and Jessica by faking their deaths. The chapter culminates in Yueh implanting a poison gas-emitting false tooth in Leto's mouth, setting the stage for a deadly confrontation.