Question. Context: Jadzia is murdered in "Tears of the Prophets", the finale of the sixth season. She and Worf had been trying to conceive, despite the doubts of Dr. Bashir that such a pregnancy was possible. After Major Kira tells Jadzia she has been praying for a conception, Jadzia receives encouraging test results from Julian, and goes to the station's temple to thank the Prophets. It now appears a pregnancy will be possible. The Cardassian Dukat arrives, possessed by a Pah-wraith, with the intention of destroying the orb-like Bajoran artifacts known as the "Tears of the Prophets". Jadzia is no match for Dukat while he is infused with the Pah-wraith. He mortally wounds her and destroys the orbs. Upon her death in the infirmary, a distraught Worf screams out a Klingon wail of sorrow for his beloved and to let the Klingon afterworld know a warrior was on the way ("Heart of Glory"). Her death shakes the crew to its core: by the beginning of season 7, Sisko has left the station in despair and Worf has been risking his life on increasingly dangerous missions.

Question: what episode of deep space nine does dax die?
Answer. Tears of the Prophets
What step-by-step reasoning justifies that answer?
Reasoning: To answer this question, we should know that: Jadzia is murdered in "Tears of the Prophets", the finale of the sixth season.