The 'Dune: Prophecy' premiere ends with a shocking twist. Star Jihae breaks down Kasha's fate.

HBO

• The series premiere of "Dune: Prophecy," which aired Sunday, ended with a shocking twist.
• The HBO show is a prequel series set within the universe of Denis Villeneuve's "Dune" movies.
• The star at the center of the twist spoke to BI about filming her character's big scene.

Warning: Major spoilers ahead for "Dune: Prophecy" season 1, episode 1.

A pair of shocking deaths close out the first episode of "Dune: Prophecy," the new...