“Past Prologue” is a solid episode on backstory and introductory grounds. It introduces the Cardassian mystery man Garak, who works on the promenade as the station’s tailor (a career that has inexplicably not become obsolete 350ish years from now in space). Garak has an espionage past that the show winks and nods to the audience about, and he and Dr. Bashir have a cute little bromance where they meet for lunch every day and Bashir accuses Garak of being a spy and Garak denies it unconvincingly.
The trouble with this episode is that that’s only the B-plot, and, much as we love Garak, we can only watch so many episodes about Kira and Bajor and terrorism, and we need to save up our chips for later in the series when episodes meeting that description are top-notch. The A-plot here really just informs us about Kira’s previous terroristing about, as I like to call it, and lets us see some conflict between her previous terrorist self and her current (?) stand-up self. An old terrorist buddy shows up, Sisko wants to imprison him for war crimes, Kira goes over Sisko’s head to get the guy in the clear, and Sisko is hurt because he thought they were BFFs.
Her old buddy, it turns out, wants her to help him blow up the wormhole (?) so that everybody will leave Bajor alone (solid plan, buddy), and Kira is all torn for way too long, before finally deciding to be a grown-up and spill everything to Sisko. There’s a sting operation and a chase, and Odo captures the terrorist guy and Kira and Sisko are all like, “Feds for LIFE, bishes,” because now they really are BFFs.
And that’s what you missed on: that episode we didn’t particularly want to watch.