DS9 Season 7 Episode 18 'Til Death Do Us Part

Plot

Kai Winn experiences what she believes to be a vision from the Prophets—the first vision the Prophets have sent her. They say that "the Sisko has faltered," that they have chosen her to guide the "Restoration" of Bajor, and that she will be aided by a guide who has "the wisdom of the land." Dukat, disguised as a Bajoran, visits Kai Winn, posing as Anjohl Tennan, a Bajoran farmer whose life was spared during the occupation by Winn's intervention. Winn believes that this "man of the land" is the guide the Prophets sent her. Dukat plays to Winn's ego and her jealousy of Sisko's status as the Emissary. Winn and "Anjohl" quickly become very close, to the disapproval of Solbor, one of Winn's aides.
Sisko tells Yates that the Prophets warned him against getting married, and breaks off their engagement. Although Colonel Kira, his Bajoran first officer, tells him he is doing the right thing by following the will of the Prophets, he is miserable. He chases Yates down before she leaves DS9 and tells her he wants to marry her regardless of what the Prophets say. They are married immediately in last-minute ceremony; Sisko has another vision from the Prophets during the ceremony, but tells them that he will never be happy without her.
Dax and Worf, held prisoner on a Breen ship, continue arguing about their complex relationship, their recent ill-advised sexual encounter, and Jadzia's legacy. They are both painfully interrogated by the Breen. After returning from her interrogation session, Dax deliriously declares her love for Dr. Julian Bashir, inflaming Worf's jealousy. Eventually the Breen deliver Worf and Dax into the custody of the Dominion, revealing finally that the Breen have allied themselves with the Dominion.