The Adversary (Star Trek: Deep Space Nine)

"The Adversary" is the 72nd episode of the syndicated American science fiction television series Star Trek: Deep Space Nine, the season finale of the third season.

Set in the 24th century, the series follows the adventures of the crew of Deep Space Nine, a space station located near a stable wormhole between the Alpha and Gamma quadrants of the Milky Way Galaxy; the Gamma Quadrant is home to the Dominion, a hostile empire controlled by the shape-shifting Changelings. In this episode, set mostly on the starship Defiant, the newly promoted Captain Sisko (Avery Brooks) and the crew must stop a Changeling infiltrator attempting to start a war between the United Federation of Planets and one of its neighbors. The episode guest stars Lawrence Pressman as an ambassador, and Kenneth Marshall appears in his recurring role as Michael Eddington.

"The Adversary" achieved a Nielsen rating of 7.1 points and third place for that time slot at its debut on syndicated television networks in June 1995.