When the Cardassian occupation of Bajor ended in 2369, the mining space-station Terok Nor was left abandoned, its systems ripped out. By invitation of the provisional Bajoran government, Starfleet stepped in to oversee the rebuilding and day-to-day operations of the newly christened Deep Space Nine. DS9 soon became a center of travel and commerce thanks to a newly found stable wormhole leading to the largely unexplored Gamma Quadrant.
Stardate: Unknown Several months after Deep Space Nine was handed over to the Dominion, the Federation is losing the war. Being relieved of command of the Defiant, Sisko is placed in command of a salvaged Jem'Hadar warship they discovered several months earlier, and must destroy the main Ketracel White production facility in the Alpha Quadrant. The mission is a success but it leaves the ship without warp engines and stranded 17 years from the nearest Federation Starbase.
Stardate: 51107.2 The damaged Jem'Hadar ship captained by Sisko crashes on a planet. Dax is seriously injured, but kept alive by Dr. Bashir. A group of Jem'Hadar who also crashed on the ship finds them, and takes them to their injured Vorta leader, who has a proposition for Sisko he may not be able to refuse.
Stardate: Unknown Worf must help his son, Alexander, to learn the ways of a Klingon warrior, while on a ship patrolling for Dominion vessels.
Stardate: 51149.5 Sisko is promoted, and Dax is placed in command of the Defiant. She must disable a Dominion sensor array that has been monitoring all traffic within five sectors. Meanwhile, on Deep Space Nine, now named Terok Nor, Kira must find a way of preventing the minefield from being destroyed. Odo's loyalties are questioned when he physically joins with the Founder Leader.
Stardate: Unknown Odo struggles with his choices between his friends and the link. Sisko faces a suicide mission in order to reclaim Deep Space Nine. Rom is ordered to be executed. Ziyal is assaulted by Damar - Kira sees this altercation and nearly kills Damar over it.
Stardate: Unknown Captain Sisko and his taskforce engage the Dominion as Starfleet pushes to reclaim DS9. Meanwhile on the station, the Dominion tries to complete its plan for removing the mines from the wormhole, and meet internal resistance.
Stardate: 51247.5 Worf and Dax's marriage is threatened when Martok's wife does not welcome Dax into the House of Martok.
Stardate: Unknown The mirror universe's Bareil attempts to steal the Bajoran orb of Prophecy and Change. Things are complicated when Kira falls in love with him.
Bashir is asked to help a group of genetically enhanced people integrate into normal society, but working around their personality problems. Soon, they must analyze a proposed treaty with the Dominion and predict its outcome.
Stardate: Unknown Quark enlists the help of Rom, Nog and his employees Gaila, Leck and Brunt to rescue his mother from a Dominion prison.
Stardate: 51413.6 While en route to Gul Dukat's war crimes hearing, Sisko meets with Dukat on a shuttle. When the shuttle is attacked they crash on a planet, where Dukat has hallucinations of Weyoun and Damar ordering him to kill Sisko. Sisko must activate the distress beacon if he is to be found alive.
Stardate: Unknown It is announced that Morn has died and has left his entire estate to Quark. But claiming his inheritance lands him in a web of lies and deceit over the nature of Morn's wealth.
Stardate: Unknown Sisko has visions of himself and his crew as writers for a science fiction paper in 1950's Earth.
Stardate: 51474.2 Dax, O'Brien and Bashir take the runabout U.S.S. Rubicon to explore a nebula, when they shrink to a size where the runabout is four inches long. The Defiant is taken over by the Jem'Hadar, and it up to the tiny crew of the Rubicon to get it back.
Stardate: 51474.2 O'Brien is ordered to infiltrate the Orion Syndicate to expose a Federation informant. However, his involvement may lead to the death of his new friend.
Stardate: 51597.2 Worf is forced to choose between the life of his wife Jadzia, and the success of the mission when they must find a Cardassian defector that seeks their help.
Stardate: Unknown When Gul Dukat reveals to Major Kira that her mother was a 'comfort woman' for him during the occupation, Kira uses the Bajoran Orb of Time to travel to the past and find the truth.
Stardate: Unknown Bashir falls under suspicion of unknowingly supplying information to the Dominion, however, all is not as it may seem.
Stardate: 51721.3 Sisko and Garak lure the Romulans into the Dominion war in order to get them to join the Federation/Klingon Alliance. Without them, the Federation and Klingon Empire would eventually lose the war and fall under Dominion rule.
Stardate: Unknown Odo uses Bashir's holosuite character of Vic Fontane to bring himself and Kira closer together.
Stardate: Unknown A mysterious tablet is found in the ruins of B'hala, foretelling that "The Reckoning" will soon begin. As Sisko tries to translate the texts on the tablet, Kai Winn pays a visit to Deep Space Nine, demanding that the tablet should be given back to Bajor. Sisko, getting an impulse from the Prophets, smashes the tablet, releasing strange energy-beings. Subsequentely, a Prophet saying that she must defeat the 'Evil One,' which will then usher in Bajor's Golden Age, possesses Kira. Sisko does not intervene, even when the 'Evil One' inhabits the body of his son, Jake.
Stardate: Unknown Nog and Jake are rescued by the U.S.S. Valiant when their ship is attacked by the Dominion while on their way to Ferenginar. The crew of the Valiant consists of the Starfleet Cadet corps known as 'Red Squad,' an elite band of cadets, after the main crew were killed when the Dominion War broke out. They decide to complete their mission, which Jake sees as suicide.
Stardate: Unknown Thanks to his relationship with Quark and Rom's mother Ishka, Grand Nagus Zek announces that he will allow equal rights for women on Ferenginar. When Ishka has a heart attack, Quark poses as a convincing female in order to let the law pass.
Stardate: Unknown While on a nearby planet, the O'Brien family picnic is interrupted when Molly wanders off and falls into a vortex that sends her 300 years into the past. When they re-open the vortex, they try to retrieve her, but a miscalculation causes an 18-year-old Molly to appear. It is up to the crew of Deep Space Nine to try to re-educate her, while trying to find the original.
Stardate: Unknown The Defiant attempts to rescue Captain Lisa Cusak who has crashed on a planet with high amounts of carbon dioxide. She has a limited supply of triox, which keeps her alive, but not enough to last until the crew arrives.
Stardate: Unknown Sisko is ordered to launch attacks against Cardassia and the Dominion. In his absence, Dax is left in command if the station. Gul Dukat is possessed by a Pah-wraith in an attempt to destroy the Bajoran Wormhole and the Prophets. Dukat manages to destroy one of the Bajoran Orbs, and kills Jadzia in the process, although the Dax symbiont is saved. The Bajoran Wormhole implodes, the Orbs go dark, and Sisko is forced to take time out while the war continues.