Sisko, Jake, Nog, and Quark go camping on a Gamma Quadrant world but are captured by mysterious soldiers called the Jem'Hadar and meet a force to rival the Federation.
Sisko takes the new USS Defiant into the Gamma Quadrant to find the mysterious leaders of the Dominion and avert a war, while Odo is drawn by instinct towards his home planet.
Odo begins to connect with his fellow Changelings as Sisko attempts to negotiate peace with the Dominion.
Quark lies about killing a Klingon and is then forced to marry the widow, founding his own 'House of Quark'.
A secret from Dax's past could mean the end of the current host's life.
Kira is kidnapped by Cardassians, surgically altered to look Cardassian and told she is actually an undercover Cardassian agent.
A Jem'Hadar infant is found in salvaged spaceship wreckage and Odo strives to teach the rapidly maturing soldier to think for himself.
Deep Space Nine is progressively locked down after O'Brien, Jake and Sisko accidentally activate an automated Cardassian security program.
Dax falls in love with someone who will soon disappear.
Tom Riker, posing as Commander Riker, shows up unannounced and uses Kira's interest in him to steal the USS Defiant and take it on a mission for the Maquis.
Lwaxana Troi pursues Odo during the Bajoran Gratitude Festival as members of the crew suddenly become infatuated with one another.
A transporter accident sends Sisko, Bashir and Dax three centuries into Earth's dark past.
Sisko assumes the role of a pivotal historic figure in order to restore the timeline.
Bashir's ethics are put to the test as he keeps Vedek Bareil alive long enough to help Kai Winn complete negotiations for a peace treaty with Cardassia.
When Kira's life is put in jeopardy Odo realizes the depth of his feelings for her.
Despite a Bajoran prophecy of destruction, Sisko assists in a joint scientific venture with the Cardassians to open communications through the wormhole.