is the high-stakes finale of Star Trek: Deep Space Nine 's third season. It serves as a pivotal bridge for the series, transitioning from the localized politics of Bajor and the wormhole to the existential threat of the Dominion War . Episode Overview Title: The Adversary Original Air Date: June 19, 1995 Director: Alexander Singer
A Founder posing as Ambassador Krajensky manipulates the Defiant into attacking a Tzenkethi colony. The crew must navigate a "The Thing"-style atmosphere of paranoia as they try to root out the shapeshifter.
While on a mission to the Tzenkethi border, the crew of the USS Defiant discovers a Changeling infiltrator has sabotaged the ship to spark an unprovoked war between the Federation and the Tzenkethi. Major Plot Points
The episode begins with Benjamin Sisko being promoted from Commander to Captain , a milestone celebrated by the entire crew.
Before dying, the Changeling whispers a haunting warning to Odo: "You are too late. We are everywhere." DS9, Episode 3x26, The Adversary : r/StarTrekViewingParty