As we reach the end of Season 3 at long last, DS9 previews the horrors to come for the Alpha Quadrant as we review "The Adversary". Our heroes get to play at their own version of "The Thing" as they deal with the haunting reality of an enemy who is a total sociopath and could be anyone or anything on the ship. But hey, at least Sisko is confronting these problems with a full four pips!