TREKCORE > DS9 > EPISODES > Season 4 Overview
 

	4x01 THE WAY OF THE WARRIOR, PART I  4x02 THE WAY OF THE WARRIOR, PART II When Klingon ships start stopping ships leaving Bajoran space to search them for Changelings, Sisko calls on the aid of Lt. Commander Worf. Worf learns that the Klingons plan to invade Cardassia on the suspicion that the new civilian government is run by the Founders.
	4x03 THE VISITOR An accident in the Defiant's engine room causes Sisko to disappear before Jake's eyes. When Ben Sisko begins appearing to him for a few minutes at a time, with years between appearances, it becomes clear that he is not dead, but trapped in subspace.
	4x04 HIPPOCRATIC OATH Bashir and O'Brien are captured by a group of Jem'Hadar. But these Jem'Hadar are different - their leader is actually free of their race's genetic addiction to the enzyme known as Ketracel-white, and has brought the others here in hopes of freeing them as well.
	4x05 INDISCRETION Kira and Dukat embark on a mission to find lost Bajoran prisoners. On the mission, Dukat reveals that he too has someone he is concerned about on the ship, a Bajoran woman with whom he had an affair. Kira learns also that Dukat's half-Bajoran daughter was also on the ship.
	4x06 REJOINED Dr. Lenara Kahn, a joined Trill whose previous host was the wife of one of Dax's former hosts, Torias. Trill society has a strict taboo against "reassociation" with past lovers, so Dax and Lenara must be careful about interacting... but despite their best efforts they find themselves reawakening old emotional ties.
	4x07 STARSHIP DOWN Two Jem'Hadar ships arrive to punish the Karemma for meeting with the Federation. When the Defiant goes after the Jem'Hadar, who pursue the Karemma ship into the atmosphere of a gas giant, it is attacked and heavily damaged.
	4x08 LITTLE GREEN MEN When Quark, Rom and Nog travel to Earth onboard Quark's new shuttle, the three Ferengi (plus one stowaway) end up going through a time warp to Roswell, New Mexico in 1947. But far from trying to go home while leaving the timeline intact, Quark has other plans.
	4x09 THE SWORD OF KAHLESS Together, Kor, Dax, and Worf go to a planet in search of the legendary Sword of Kahless. But they have been followed there by Toral, the last member of the House of Duras, who once tried to seize power, and whose life was spared at the time by Worf.
	4x10 OUR MAN BASHIR Sisko, Kira, Dax, Worf, O'Brien and Bashir are embroiled in Bashir's secret agent holoprogram when a runabout explodes due to sabotage. The Ops transporter is damaged while beaming them off, but Odo and Eddington manage to store the patterns... in Bashir's holo-program.
	4x11 HOMEFRONT Sisko and Odo go to Earth, where Sisko is made the acting head of Starfleet security. With the help of Sisko's old friend, Admiral Leyton, Sisko and Odo convince the Federation President to authorize stringent security measures. But it may be too late, as Earth's power relays are sabotaged and Sisko is forced to institute martial law.
	4x12 PARADISE LOST A state of emergency has been declared on Earth, and armed Starfleet security officers are on the streets. Meanwhile, Sisko discovers Admiral Leyton is trying to oust the President and take over Earth to fortify it against the Dominion.
	4x13 CROSSFIRE When Shakaar visits DS9, threats are made on his life, and Odo must guard him around the clock, a task made especially difficult when Shakaar and Kira start getting close... very close. Odo, who is himself secretly in love with Kira, is caught up in emotional turmoil that starts to affect his ability to do his job.
	4x14 RETURN TO GRACE Kira leaves for a Cardassian outpost with Gul Dukat. When they arrive at the outpost, they find it destroyed by a Klingon Bird of Prey, which ignores Dukat's freighter. At Kira's suggestion, Dukat adapts a disruptor from the outpost and goes after the Klingons.
	4x15 SONS OF MOGH Worf's younger brother Kurn arrives on DS9, a broken, drunken outcast who has lost his seat on the Klingon High Council due to Worf's having sided against the Empire. Kurn demands that Worf perform the Mauk-to'Vor, a ritual in which by killing Kurn Worf can restore Kurn's lost honor.
	4x16 BAR ASSOCIATION Rom decides he has had enough of his brother's heavy-handed management. He forms a union of all the bar and casino workers, to demand increased pay, shorter hours, and paid sick leave. When Quark laughs in their faces, the union promptly goes on strike.
	4x17 ACCESSION Bajoran poet Akorem Laan believes himself to be the Emissary, a role that Sisko is all too happy to relinquish to him. Akorem begins trying to lead Bajor back to the old days, when their caste system determined the careers people followed.
	4x18 RULES OF ENGAGEMENT While commanding the Defiant on a mission to escort a relief convoy to a plague-stricken Cardassian colony, Worf apparently destroyed a Klingon civilian transport which decloaked in the middle of a battle with two other Klingon ships. Now an extradition hearing is taking place on DS9, with Sisko defending Worf.
	4x19 HARD TIME On a mission to Argratha in the Gamma Quadrant, Chief O'Brien has been convicted of espionage. As punishment, the Argrathi give him false memories of twenty years in prison. When he returns to Deep Space Nine, O'Brien has trouble readjusting to life on the station.
	4x20 SHATTERED MIRROR Mirror Universe Jennifer lures Jake back to her universe with her, as part of a plan to coerce Sisko into helping finish the mirror version of the U.S.S. Defiant. Sisko follows, and finds himself in a race against time to prepare the ship before the arrival of an Alliance fleet.
	4x21 THE MUSE Jake meets a mysterious woman named Onaya, who claims to have "a weakness for artists", and who says that she can help Jake to develop his talent for writing. His life is endangered as he falls deeper and deeper under her spell.
	4x22 FOR THE CAUSE Sisko is shocked and skeptical to learn that there is evidence suggesting that his lover, freighter captain Kasidy Yates, is smuggling supplies to the Maquis. However, the cloaked Defiant follows her ship, the Xhosa, on a run to the Badlands, where the crew witnesses Kasidy making a delivery to a Maquis ship.
	4x23 TO THE DEATH Sisko realises that renegade Jem'Hadar have seized control of an Iconian gateway in the Gamma Quadrant. He must enter into an uneasy alliance on a mission to destroy the gateway before the renegades manage to restore it and gain the ability to instantly travel to any planet in the galaxy.
	4x24 THE QUICKENING Bashir, Dax, and Kira discover a planet where the population, once a spacegoing culture, is suffering from an incurable fatal disease inflicted on them by the Jem'Hadar for defying the Dominion. Bashir becomes obsessed with finding a cure for the Blight, despite the opposition from natives.
	4x25 BODY PARTS Quark has been diagnosed with Dorek syndrome - an incurable fatal disease - and has six days to live. In order to pay off his debts, he sells his vacuum-desiccated remains on the Ferengi Futures Exchange only to learn that he doesn't have the disease after all. But when his mysterious buyer arrives... he doesn't want a refund.
	4x26 BROKEN LINK Odo begins suffering from a destabilization of his molecular structure which makes it difficult for him to maintain solid form. The only answer is for the Defiant to take Odo into Dominion space and ask for the Founders' assistance. The Founders agree - in fact, they admit to causing Odo's condition to force him to return and be judged.