A joint Federation/Bajoran/Cardassian science mission to establish a communications relay through the wormhole is complicated when a Bajoran vedek believes that success will cause a prophecy of doom to come true.

* AnywhereButTheirLips: The Cardassian woman who spent the episode hitting on O'Brien gives him a goodbye kiss on the cheek after he tells her that he's HappilyMarried.
* BrickJoke: Quark intends to welcome the Cardassian delegation with a few bottles of ''kanar'' that he had stashed away, until Dax tells him that it's gone bad. A few scenes later, Bashir mentions Morn coming to the infirmary with food poisoning from a bad glass of ''kanar''. It was on the house, apparently.
* ChickMagnet: ''O'Brien'' thanks to a bit of "[[CrossCulturalKerfluffle Cross-cultural misunderstanding]]."
** {{Tsundere}}: This trope is the way Cardassians flirt.
* FromACertainPointOfView: The prophecy comes true. Just not in the way Sisko and Kira expected.
* TheMole: Dejar is really an Obsidian Order agent, whose mission was to sabotage the project in order to demonstrate that Bajorans and Cardassians could not work together.
* SlapSlapKiss: As mentioned, this is SOP for Cardassians. Miles, being [[SeductionProofMarriage Miles]], shuts it down before Stage 3.
* TeethClenchedTeamwork: Despite being their "colleague", Ulani and Gilora don't get along very well with Dejar and often react uncomfortably to her. It's because she's actually an Obsidian Order agent who is there to (without Ulani or Gilora's knowledge) sabotage the mission. When Gilora realizes what Dejar's done, she doesn't hesitate to speak up.