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Deep Space Nine's third season finale begins on an upbeat note, as Benjamin Sisko is appointed Captain. Things quickly take a downturn when one of Odo's fellow Changelings tricks Sisko into a course of action that turns out to be a Dominion plot to spark an apocalyptic war in the Alpha Quadrant. Even when Sisko manages to get things under control -- or so it seems -- he must come to grips with the fact that his troubles are just beginning. Originally telecast June 19, 1995, "The Adversary" was written by veteran Deep Space Nine scriveners Ira Steven Behr and Robert Hewitt Wolfe.