DS9 Season 6 Episode 26 Tears of the Prophets

Plot

Admiral Ross (Barry Jenner) informs Captain Benjamin Sisko (Avery Brooks) that Starfleet intends to go on the offensive in the war against the Dominion. They decide to attack the Chin'toka star system—but must attack soon, as intelligence arrives that the Cardassians and the Dominion are about to improve Chin'toka's defenses with unmanned weapons platforms. Meanwhile, Lt Cmdr. Worf (Michael Dorn) and Lt Cmdr. Jadzia Dax (Terry Farrell) discuss their plans to have a baby.
The night before the attack, Sisko receives a vision from the Prophets, who warn him not to leave the station. Sisko tells Ross about the vision, who responds that he must decide between his duty to Starfleet and the Prophets.
Meanwhile, the Cardassian leader Damar (Casey Biggs) and his Dominion handler Weyoun (Jeffrey Combs) receive an unexpected visit from Damar's predecessor, Dukat (Marc Alaimo). Dukat discloses his plan to allow one of the enemies of the Prophets, the Pah-wraiths, to possess him. He breaks a Bajoran artifact, releasing a red mist that enters his body.
The attack fleet arrives at Chin'toka just as the weapons platforms are activated. As the fleet is being destroyed, on board the USS Defiant, Elim Garak (Andrew Robinson), a Cardassian working with Starfleet, infers the platforms can be taken offline if they find and destroy the central power source.
On Deep Space Nine, Dax is visiting the Bajoran Temple when Dukat, possessed by the Pah-wraith, suddenly transports in; he hits her with bolts of energy from his hands and she collapses. He opens an Orb of the Prophets and the Pah-wraith leaves his body, entering the Orb, which turns black. Outside the station, the Bajoran wormhole implodes.
On the Defiant, Sisko is shaken, sensing the attack on the Prophets; Major Kira (Nana Visitor) takes over and successfully commands the destruction of the weapons platforms. After the battle, they are summoned urgently back to the station. When they arrive, they are informed that the wormhole is gone and all the Bajoran orbs have turned dark.
Dr. Bashir is able to save the Dax symbiont that shares Jadzia's consciousness, but not Jadzia herself. She survives long enough to say goodbye to Worf. Over Jadzia's coffin, Sisko decides that he must take a leave of absence on Earth. He departs with his son, Jake (Cirroc Lofton), leaving Kira in charge of DS9.