TMDb/Dune: Part Three Movie Will Dune Part Three include the iconic knife-throwing scene? Discover why this critical moment from Dune Messiah is the ultimate test for the film's success. April 12, 2026 AceShowbiz - Warning: Spoilers ahead for Dune Messiah, the source material for Dune Part Three. Expectations are tremendously high for the upcoming third installment in the Dune film series. However, for devoted fans of Frank Herbert's novels, there is one critical scene that will ultimately determine the success or failure of Dune Part Three: the knife-throwing sequence.