Sisko and Jadzia Dax accidentally discover nearby the first known stable wormhole, which not only provides two-way quick access to the previously distant, unexplored Gamma Quadrant, but is also considered by the Bajorans to be the home of their gods, the Prophets ("Emissary").
When Terry Farrell, the actress who portrayed her, left the show, Jadzia was killed by the Cardassian Dukat, and the symbiont transferred to Ezri (Nicole de Boer).
Miles O'Brien (Colm Meaney) is the station's chief of operations, transferring over from Star Trek: The Next Generation's starship Enterprise in the first episode.
A devout woman, she initially finds it difficult working for a commander who is also the Emissary of the Prophets, but comes to completely trust and respect Sisko.
Worf (Michael Dorn) is a Starfleet officer transferred to Deep Space Nine after having served aboard the Enterprise under Captain Jean-Luc Picard.
[1] Bareil becomes a recurring character who has a romantic relationship with Major Kira Nerys, a subplot that begins at the start of season 2 and concludes with his death in "Life Support".
Bareil is injured in a shuttle explosion, and Dr. Julian Bashir has to replace his failing organs with cybernetics so that he can continue to advise Winn in vital negotiations with the Cardassians.
Cretak was first portrayed by Megan Cole in "Image in the Sand" and "Shadows and Symbols," and Adrienne Barbeau in "Inter Arma Enim Silent Leges."
Damar discovers a way to disable the Federation's self-replicating mines protecting Deep Space Nine, which had been preventing the Dominion from sending reinforcements from the Gamma Quadrant through the wormhole.
As the Federation retakes the station, Damar learns that Tora Ziyal, Dukat's half-Bajoran daughter, had been helping Kira and others undermine them, and kills her.
With the Dominion on the verge of losing the war, Dukat allies himself with the Pah-wraiths, the enemies of the Prophets, but is foiled by Sisko in his attempt to release them from their captivity and instead ends up joining them in eternal imprisonment.
He turns out to be a former top operative of the Obsidian Order, the powerful and feared Cardassian intelligence organization, and the illegitimate son of its longtime head, Enabran Tain.
Later, she has a romantic relationship with Grand Nagus Zek, and eventually persuades him to begin changing the regulations that govern Ferengi business, with far-reaching consequences for that society.
She is a ringleader when Quark's employees attempt to start a trade union, and also volunteers to play temporary host to one of Jadzia Dax's former personalities.
[15][16] According to make-up designer Michael Westmore, on the first day of filming the director chose Morn randomly from among several prosthetic characters.
For example, when it became clear that war with the Dominion is inevitable, Morn throws a chair at Quark, then runs naked across the Promenade screaming, "We're all doomed!"
When an accident endangers her and her unborn second child, Doctor Bashir saves them both by removing the fetus and implanting it into Kira Nerys' womb.
During the Cardassian Occupation, Opaka had been a collaborator: she gave away the whereabouts of a rebel base, and her son was killed in the subsequent attack, in order to save thousands of other Bajoran lives.
Journeying with Sisko and Kira through the wormhole, she is killed in a crash on the Ennis penal moon, but is resurrected by artificial microbes present there.
[18] In 2021, Julian Beauvais, writing for Screen Rant, thought that Rom was an honorable character for trying to take care of his family, using his engineering abilities to help defeat the Dominion during the war, and as Grand Nagus planning to reform Ferengi society to be more egalitarian.
He pushes to fast-track Bajor's admission to the UFP, but that act is postponed at the last minute by Sisko's pagh'tem'far (sacred vision) that it is not the right time.
Joseph remarried, but having been greatly emotionally wounded by Sarah's inexplicable leaving, could not bring himself to disclose to Benjamin who his real mother was.
Sloan appeared in three episodes of Star Trek: Deep Space Nine: "Inquisition", "Inter Arma Enim Silent Leges", and "Extreme Measures".
Bashir discovers evidence that Section 31 is responsible for infecting Odo with a genocidal virus intended to kill all the Founders and end the Dominion War.
Tain attempts a comeback by destroying the Founders' homeworld with a combined fleet of Obsidian Order and Romulan Tal Shiar ships.
Dukat originally intends to kill Ziyal to protect his career, as the Cardassians consider her an abomination, but Kira's arguments and his own paternal love convince him not to.
The Circle's goal is to eliminate all external influences from Bajor, including the Federation, which would have served Winn's purposes in getting rid of Commander Sisko, whom she resents as the Emissary of the Prophets.
Although Bareil is later proven innocent by Kira, he chooses not to reveal the truth, which is that Kai Opaka had actually been responsible for the massacre, a move that resulted in 43 deaths, including that of her own son, but which had saved over 1,400 other Bajoran lives.
In the series finale "What You Leave Behind", and after the battle of Cardassia, Sisko travels to the Fire Caves on Bajor, where the Pah-wraiths are imprisoned, to confront Winn and Dukat.
They are briefly broken up by Quark at the prodding of Liquidator Brunt, who wants to succeed Zek as Nagus, but the plot fails in "Ferengi Love Songs".