Stardate: 46379.1. Commander Benjamin Sisko and a new crew of Starfleet and Bajoran officers take command of an abandoned Cardassian space station and make an incredible discovery that will change the galaxy and Sisko's future.

A new crew is assigned to a former Cardassian space station: Deep Space Nine. It is a joint Federation/Bajoran force, with Commander Sisko in charge, but his life is dramatically changed when he is declared the Emissary to the Prophets by a Bajoran priest.

A Cardassian suffering from Kalla-Nohra, a disease that indicates he served in a labor camp, visits DS9. Kira is determined to convict him as a war criminal.

Stardate: Unknown. Word that a previously thought dead Bajoran resistance legend is still alive sends Kira and Chief O'Brien to Cardassia IV to rescue him; meanwhile "The Circle", a sect of the Bajoran provisional government that is intent on wiping out alien influence, is sneaking into power.

Stardate: 47177.2. Political heat rises on the station as Bajorans enter the station with orphaned Cardassians they have adopted.

Stardate: 47282.5. Odo relives some terrible and tragic memories of a past investigation when he was the constable on Cardassian-occupied Deep Space Nine, then named Terok Nor.

Stardate: Unknown. The destruction of a Cardassian ship leads Sisko, Dukat, and Sisko's old friend Cal Hudson to the fact that there is an unofficial war between the Maquis and the Cardassians.

Stardate: Unknown. Sisko tries to resolve the Maquis crisis by preventing a war, freeing Gul Dukat and offering the defected Hudson the chance to return.

Stardate: Unknown. The station goes into lockdown and the crew is endangered when an old Cardassian security program is accidentally activated.

Stardate: 48467.3. The DS9 crew welcomes a visit from William Riker of the Enterprise, but the lieutenant’s hidden agenda leads to a tense standoff deep in Cardassian space.

Stardate: Unknown. Sisko rebuilds an ancient Bajoran space vessel from the blueprints, and he and Jake take the ship on a trip, attempting to prove that the ancient Bajorans went beyond their solar system without warp drive.

Stardate: 49011.4. When the Klingons bring a task force to DS9, Captain Sisko sends for Starfleet's lone Klingon officer, Worf, to uncover the mysterious intentions of their presence.

Stardate: Unknown. Kira and Gul Dukat go after the lost prison ship Ravinok. Dukat has a secret. Meanwhile Kasidy Yates tries to find work near Bajor, leaving Sisko uncomfortable.

Stardate: Unknown. Dukat returns, stripped of his prestige, to escort Kira to a Cardassian conference about the Dominion. But an attack by a Klingon raider may give Dukat a chance to redeem himself in the eyes of his government.

Stardate: Unknown. With the war between Klingons and Federation intensifying, Sisko must make a plan to expose Gowron as a changeling. Odo is still having trouble with becoming a solid.

Stardate: Unknown. Sisko, Dax, Odo and Garak find themselves in the past when the Cardassians controlled the station, and a crime that Odo investigated may be the key.

Stardate: Unknown. A coded message from the Gamma Quadrant leads Garak to believe his mentor, Enabran Tain, is still alive. He and Worf seek him out, only to discover something much worse: a Dominion invasion fleet poised to attack the Alpha Quadrant.

Stardate: 50564.2. The station readies for a Dominion attack. Worf and Garak meet some unexpected friends in a Dominion Prison camp.

Stardate: 50712.2. When a Cardassian official that thinks of Kira as his daughter is dying, he agrees to reveal all he knows to her. But the experience dredges up Kira's memories of her own father's death.

Stardate: 50975.2. Sisko decides to mine the wormhole to prevent further Dominion ships crossing into the Alpha Quadrant. This provokes an attack by the Dominion and the Cardassians, and a desperate last stand on Deep Space Nine.

Stardate: Unknown. As the war between the Federation and the Dominion continues, Sisko and his crew are reassigned from the Defiant, while Kira and Odo cope with the bureaucracy of the station's occupation.

Stardate: Unknown. Worf and his son Alexander must come to terms with one another when Alexander is assigned to the Rotarran and voices his intentions to become a warrior. Meanwhile, Kira finds herself between friend and foe when Ziyal returns to the station and reconciles with her father.

Stardate: 51145.3. Odo finds his priorities at odds with Kira's resistance efforts when the Female Changeling comes to him and offers to guide him in learning about the Great Link.

Stardate: Unknown. On the eve of Dukat successfully disabling the minefield, Sisko coordinates a massive assault to retake Deep Space Nine.

Stardate: Unknown. The Federation's only hope of stopping massive Dominion reinforcements from entering the Alpha Quadrant relies on Sisko's suicide mission to reach DS9 before the minefield is destroyed.

Stardate: 51408.6. After being attacked by Cardassian forces, Sisko gets stranded with a very psychotic Gul Dukat, who was being transported to his trial. Meanwhile the crew of the Defiant races to rescue survivors.

Stardate: Unknown. After receiving some disturbing information from Gul Dukat, Major Kira seeks Sisko's approval as Emissary to travel back in time to find out the truth about her mother. Meanwhile, Chief O'Brien and Dr. Bashir discuss a holosuite program surrounding the Battle of the Alamo.

Stardate: Unknown. When Sisko is picked to head up an attack on the Cardassian homeworld, the Prophets appear to him in a vision, warning him of impending doom if he leaves the station.

Stardate: Unknown. Kira is kidnapped by a Bajoran Pah-wraith cult led by Dukat.

Stardate: 52576.2. While Ezri goes searching for Worf, who has been missing since a Dominion attack on his ship, Sisko proposes marriage to Kasidy and begins plans to build a house on Bajor.

Stardate: Unknown. Sisko must decide whether to oppose the Prophets and marry Kasidy. Meanwhile, Dukat comes to DS9 with a Bajoran identity and a plan to manipulate Kai Winn; and Worf and Ezri are held captive by the Breen.

Stardate: Unknown. A new alliance between the Dominion and the Breen further appalls Damar. Meanwhile, Winn finds her spirituality thrown into chaos when she has a vision from the Pah-wraiths.

Stardate: Unknown. As Winn begins studying her uncertain role in following the path of the Pah-wraiths, the Federation engages in battle for the first time against the Dominion and their new Breen allies.

Stardate: Unknown. As Kira leads a mission to help organize Damar's resistance forces, Bashir learns that Odo has been infected with the disease sweeping through the Great Link.

Stardate: 52902.0. As the war careens toward a final showdown on Cardassia, Sisko's definitive action as the Emissary draws near.

Stardate: Unknown. Sisko leads, what he hopes will be, a final all-out assault on Cardassia Prime. Kira and Garak mount a suicidal assault on the Cardassian headquarters occupied by the Dominion, who in turn kill innocent women and children village by village in retaliation for the Resistance's attacks.