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: 49011.4. Sisko becomes uncomfortable when the Klingons station a task force to help defend against the Dominion. Worf is summoned to find out their true intentions.

Stardate: Unknown. Melanie, an aspiring writer, wants to know why Jake Sisko stopped writing at 40. Jake tells how his father died in an accident and then suddenly reappeared.

Stardate: 49066.5. Bashir is asked to help a group of renegade Jem'Hadar break their addiction to ketracel white. Meanwhile Worf is dissatisfied with the way Odo runs security.

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: 49195.5. Lenara Kahn, the new host of the wife of Dax's former host Torias, comes to the station. While they're not allowed to renew their relation, there's still a spark.

Stardate: 49263.5. A damaged Defiant must play a dangerous game of cat-and-mouse with two Jem'hadar ships inside a gas giant.

Stardate: Unknown. Quark and Rom take Nog to Earth and Starfleet Academy, but a malfunction with the ship takes the crew back in time, to Roswell New Mexico in 1947.

Stardate: Unknown. Worf, Dax and the Klingon Dahar master Kor set out to find an ancient lost relic: the Sword of Kahless.

Stardate: Unknown. When an transporter emergency turns the command crew into holosuite characters, Bashir's James Bond fantasy takes on a deadly reality.

Stardate: 49170.65. Sisko travels to Earth when a bombing at a Federation conference is determined to be the work of Changelings.

Stardate: Unknown. When Starfleet institutes martial law to combat the Changeling Menace, Sisko begins to question if the Dominion is the real threat.

Stardate: Unknown. First Minister Shakaar visits the station, despite a threat of assassination. He falls in love with Kira much to Odo's dismay.

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: 49556.2. Worf's brother Kurn asks him to perform a death rite to regain his lost honor. Meanwhile Kira and O'Brien investigate Klingon activity near the Bajoran border.

Stardate: Unknown. Unfair working conditions and pay cuts cause Rom to organize a union of the employees of Quark's Bar. Meanwhile Worf still finds it hard to settle on the station.

Stardate: Unknown. A man claiming to be the emissary comes through the wormhole. Sisko is happy to give up his position. Meanwhile Keiko returns and O'Brien stops spending time with Bashir.

Stardate: 49665.3. When Worf destroys a civilian shuttle during an engagement with the Klingons, an extradition hearing is held to see if he must face charges.

Stardate: Unknown. O'Brien tries to re-integrate to life on the station after serving 20 years in a virtual prison.

Stardate: Unknown. When the Mirror Universe counterpart of Sisko's deceased wife lures Jake to the other side, Sisko must follow and help the human resistance against the Alliance's forces.

Stardate: Unknown. A mysterious woman approaches Jake about his future as a writer. Odo promises to do whatever it takes to help Lwaxana Troi keep her baby over the father's wishes - even if it means marrying her himself.

Stardate: Unknown. Sisko must face betrayal when evidence surfaces that Kasidy is smuggling for the Maquis. Meanwhile Garak makes acquaintance with Ziyal.

Stardate: 49904.2. A renegade group of Jem'Hadar plunders Deep Space Nine. Sisko agrees to a combat operation with loyal Jem'Hadar to prevent the renegades completing a planetary gateway.

Stardate: Unknown. Bashir tries to help a planet in the grips of a Dominion-engineered plague that guarantees a painful death.

Stardate: Unknown. Quarks hears on Ferenginar he is going to die. Rom convinces him to sell his remains. After an accident, Bashir has to move Keiko's baby to Kira's womb.

Stardate: 49962.4. Odo is suddenly struck by illness. He is barely able to hold shape. Bashir and Odo see no other alternative then going to the Founders. Garak wants to come along.

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: 50049.3. The crew find a crashed Jem’Hadar ship and work to repair it and capture it for the Federation, but are confronted by a Dominion force determined to recover the ship’s cargo.

Stardate: Unknown. While Worf helps Quark to pursue his former wife Grilka, O'Brien and Kira grow uncomfortably close to each other.

Stardate: Unknown. Jake, reporting from the front lines, sees what war truly is.

Stardate: Unknown. An alien entity has possessed Keiko's body and is holding it hostage until O'Brien completes an assignment for it.

Stardate: 4523.7. In this celebration of the 30th anniversary of The Original Series, the disgraced Klingon spy Darvin travels back in time to undo his century-old defeat by James Kirk. The DS9 crew must track him down and stop him, while blending in with the crew of the original Enterprise NCC-1701.

Stardate: Unknown. While vacationing on Risa, Worf and Dax meet a group of fundamentalist protesters who claim that the Federation has gone soft.

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. When Odo and Quark crash land, they must put aside their differences to climb a mountain to signal for help. Jake and Nog try to be roommates, but their different styles clash.

Stardate: Unknown. After a brain injury, Sisko begins experiencing powerful visions through time. He dives fully into the role of the Emissary, while becoming obsessed with finding a legendary Bajoran ruin.

Stardate: 50416.2. A mysterious assassin begins wiping out all the members of Kira's old resistance cell.

Stardate: Unknown. The discovery of an infant Changeling gives Odo a chance to put right the trauma of his own upbringing, while his “father” Dr. Mora insists on a more clinical approach.

Stardate: 50485.2. When the traitorous Eddington returns, Sisko will go to any lengths to capture him.

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: Unknown. Dr. Bashir is selected to be the model for the next-generation of Emergency Medical Hologram (EMH). But he balks when his parents are invited to the station to be interviewed by the EMH programmer, Dr. Zimmerman. There is a dark secret in his family that he's afraid that his parents will reveal.

Odo helps a woman hiding on the station from organized criminals, but quickly develops a personal interest in the case.

Stardate: Unknown. Quark must wrestle with his conscience when he becomes involved with arms merchants.

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: Unknown. Quark doesn't know whether to be panicked or overjoyed when he learns that his mother is the new lover of the Grand Nagus.

Stardate: Unknown. Dax and Worf accompany Martok on his first command since being held by the Dominion. But the ship they are given hasn't seen victory in months and the crew is near mutinous.

Stardate: 50814.2. The DS9 crew discovers a colony that, due to a time travel accident, turns out to be inhabited by the crew's own descendants.

Stardate: Unknown. Sisko learns that the Maquis are planning a devastating attack on Cardassia, and must rely on the traitor Eddington to help him prevent it.

Stardate: Unknown. While salvaging components from DS9's sister station, the crew run afoul of a "surprise" left behind by the Cardassians.

Stardate: 50929.4. Jake has his heart set on a vintage Willie Mays baseball card as a present to cheer up his father, whose spirits are flagging from the ongoing conflict.

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. Borrowing a captured Jem'Hadar attack ship, Sisko and crew embark on a mission to destroy the hidden base where all of the ketracel-white is stored for the entire Alpha Quadrant.

Stardate: Unknown. Sisko and his crew crash on a barren world when their commandeered Jem'Hadar ship is shot down. They encounter Jem'Hadar who crashed there earlier, and have taken Nog and Garak hostage in exchange for medical aid for their Vorta overseer.

Stardate: Unknown. Serving with his recruit son aboard a Klingon vessel, Worf finds his relationship with his son strained. Meanwhile, strained relationships abound on DS9 between Major Kira and Gul Dukat.

Stardate: 51145.3. After forming an attack plan on the Dominion, Sisko relinquishes command of the Defiant to Dax after accepting a promotion. On DS9, the resistance faces discovery when Odo links with another changeling.

Stardate: Unknown. Sisko mounts an attack to re-take DS9, while Rom faces charges as an enemy of the Dominion state.

Stardate: Unknown. The Federation attacks DS9 in hopes of keeping the mine field in the wormhole intact, while the Dominion waits entrance to the Alpha Quadrant from the other side.

Stardate: 51247.5. Suddenly desiring to wed within the week on DS9, Worf and Jadzia go through their own Klingon rituals: Worf on a four day bachelor party with the male members of the crew & Jadzia deals with her prospective mother-in-law, who totally opposes the idea of "an alien" marrying into her Klingon household.

Stardate: Unknown. Major Kira takes a romantic interest in a Bajoran radical from the other universe who transports himself into her universe and onto DS9.

Stardate: Unknown. A group of genetically engineered humans are brought to Dr. Bashir on DS9 in hopes of integrating them with the rest of the universe.

Stardate: Unknown. At the request of the Grand Nagus, Quark puts together a mission to rescue Quark's mother, who is in the hands of the Dominion.

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. A former patron of Quark's bequeaths everything to him.

Stardate: Unknown. Captain Sisko has a full sensory vision of himself as an under-appreciated science fiction magazine writer in 1950s America.

Stardate: 51474.2. An attack by the Dominion on Sisko's ship endangers Dax and her crew aboard as she leads them into an anomaly that shrinks them to a very minute size. Unfortunately, they were being held stable by Sisko within a tractor beam, which was discontinued during the attack.

Stardate: Unknown. Chief O'Brien goes undercover to infiltrate an Orion crime ring.

Stardate: 51597.2. Worf and Jadzia travel to the badlands to procure some information on the Dominion from a traitorous Cardassian. Bashir wants to engage in a holo-suite spy simulation, but O'Brien prefers to brush up on his tongo game after watching Jadzia lose to Quark.

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. Dr. Bashir's plans to attend a medical conference at a breezy resort are canceled when Starfleet Intelligence boards DS9, suspecting the doctor of treason.

Stardate: 51721.3. To save the Federation in a critical scheme, Sisko comes to realize that he must violate its fundamental principles to do so.

Stardate: Unknown. Odo is schooled in the ways of romance by a holographic programmed lounge singer.

Stardate: Unknown. Sisko runs afoul of Kai Winn when he removes a Bajoran artifact from an archaeological dig after he receives a vision from the Prophets.

Stardate: 51825.4. Jake and Nog's runabout comes under attack from the Jem'Hadar. They are rescued by the Valiant, a ship manned by Red Squad, a elite group of young Starfleet cadets.

Stardate: Unknown. Quark's mother and the Grand Nagus show up on DS9, announcing a new amendment to the Bill of Opportunities he has instituted on the home planet of Ferenganar, and then follows up with the announcement, that, due to the new amendment, chaos has followed and he has been deposed.

Stardate: Unknown. The Chief's daughter gets caught in a time displacement and when they get her back, she is considerably older.

Stardate: 51948.3. As the Defiant races to a shipwrecked officer who is days away, the crew keeps in contact with her. Meanwhile, Jake follows Quark's latest scheme for story research.

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. Sisko, laying low on Earth since the wormhole's disappearance, receives a vision of an unfamiliar woman he believes is the key to regaining contact with the Prophets. Meanwhile, Kira faces the challenge of commanding Deep Space Nine and upholding the fragile alliance with the Romulans, and Worf must cope with the loss of Jadzia Dax.

Stardate: 52152.6. Ezri Dax joins Sisko and his family on his quest for the Orb of the Emissary. Jadzia's friends and family seek a glorious battle that will earn her place in Sto-vo-kor. Kira gambles the alliance with Romulans by blockading their weapons installation on Bajor's moon.

Stardate: Unknown. Ezri Dax struggles to adjust to her new joined identity and her complicated relationships with Jadzia's friends. Meanwhile, Garak tries to deal with a severe bout of claustrophobia.

Stardate: Unknown. A Vulcan captain challenges Sisko to a game of baseball.

Stardate: Unknown. Dr. Bashir’s genetically engineered friends return to the station, seeking his help in rousing one of them from her catatonic state.

Stardate: Unknown. A Vorta offers Odo valuable information on the Dominion in exchange for asylum. Meanwhile, Nog tries his Ferengi knowledge as he wheels and deals for a valuable piece of equipment for Chief O'Brien.

Stardate: Unknown. An aged Kor requests an opportunity to die with honor as a warrior.

Stardate: Unknown. Capt. Sisko and his away team volunteer to stay with a besieged unit at an isolate outpost.

Stardate: Unknown. Kira is kidnapped and taken to Empok Nor by a member of a Pah'Wraith cult and discovers the group leader is Gul Dukat.

Stardate: Unknown. Severely depressed at his serious war wound, Nog retreats into Vic Fontaine's holosuite program while the singer tries to help him.

Stardate: Unknown. Ezri travels to her family home in search of Chief O'Brien who has discovered a murdered woman connected with the family and the Orion Syndicate.

Stardate: Unknown. Quark and Rom have to rescue Grand Nagus Zek who is being held captive in the Alternate Universe.

Stardate: Unknown. When a murder on the station stumps the crew, Ezri Dax reluctantly seeks help from the residual consciousness of the host she’d rather forget, the murderer Joran.

Stardate: 51474.2. A changeling arrives who, like Odo, says he’s grown up among humanoids with no knowledge of the Founders. He tries to convince Odo to leave humanoid society and live among changelings.

Stardate: Unknown. A hidden feature in Vic’s holosuite program causes the casino to be taken over by mobsters, and the DS9 crew plan a heist to take back their favorite hangout spot.

Stardate: Unknown. Dr. Bashir is contacted again by Sloan of Section 31, who wants him to gather intel at an upcoming Romulan medical conference. Sisko agrees to send him, in order to learn more about Section 31 themselves.

Stardate: 52576.2. When the ship Worf was serving on is attacked in battle and all search efforts are abandoned, Ezri takes a runabout in search of him against Sisko's orders. Meanwhile, Sisko proposes to Cassidy Yates.

Stardate: Unknown. The Prophets disapprove of Sisko’s upcoming marriage, and he must make hard choices about his priorities. Ezri and Worf are captured by Dominion forces. Gul Dukat, disguised as a Bajoran, infiltrates DS9 and becomes close to Kai Winn.

Stardate: Unknown. Kai Winn gets unknowingly involved with Gul Dukat, disguised as a Bajoran. Tensions rise between Weyoun and Gul Damar as the Dominion gather to sign a peace treaty with the Breen. Ezri and Worf are captives on Cardassia.

Stardate: Unknown. After the Breen attack Earth there are mixed emotions abound on DS9. Having revealed her secret regarding the Prophets to the disguised Dukat, Kai Winn turns her back on them, only to be convinced by Dukat to embrace the Pah Wraiths. On the home world of Cardassia, Legate Damar mounts a resistance to the Dominion.

Stardate: Unknown. Kira is sent to Cardassia to train their resistance. Dr. Bashir discovers that Odo has contracted the same disease threatening the Founders. Gowron arrives on DS9, announcing he’s taking control of the Klingon fleet from Martok.

Stardate: Unknown. Odo is affected by the disease threatening to eliminate his race more than he lets on. Kira has to deal with the Cardassian's dislike of her. Even though General Martok sees Chancellor Gowron's move as part of a political vendetta, he does nothing about it.

Stardate: 52645.7. Dr. Bashir and Chief O'Brien go to extreme measures to try and track down a cure for Odo.

Stardate: 52861.3. Odo begins his recovery from the deadly disease as Dr. Bashir informs him of Section 31's intentions of wiping out his race. A resistance mission goes bad for Kira and Garak and they end up hiding in the basement of the house that Garak grew up in, where they learned that Legate Damar has apparently become a casualty of war, despite him also hiding with them. Quark is chosen by the Grand Nagas as his successor upon his impending retirement to Risa.

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.

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.