Bashir tries to free the population of a Gamma Quadrant world in the Teplan system of an engineered disease left by the Dominion 200 years previously.
Air Date: 05/20/96
Director: Rene Auberjonois
Great episode that shows off just how dark DS9 can be. In TOS or TNG, this disease would have been completely cured by the end of the episode....DS9, nope.