In S3E7 of DS9: Civil Defense, an old Cardassian security program is triggered on the station and threatens the entire crew.
In S3E6 of DS9: The Abandoned, Quark accidentally buys a baby Jem’Hadar and Jake has a very booby girlfriend.
In S3E5 of DS9: Second Skin, the Obsidian Order tries to convince Kira that she’s been a secret Cardassian Agent all along. That is not nice.
In S3E4 of DS9: Equilibrium, there is a dark and deadly secret hiding in Dax’s history. We go to the Trill home world to uncover the truth..
In S3E3 of DS9: The House of Quark, Quark gets entangled in some Klingon drama and ends up on the sharp end of a blade in a shotgun wedding.