Just as "The Measure of a Man" is about Data but is really a Picard episode, "Dax" is about the titular character but is really a Sisko episode. Brooks, the featured actor for the first time since the pilot (also directed by David Carson), again proves worthy of being the leading man in the series, giving Commander Sisko a righteous vitality that surpasses that seen in Picard and Kirk. The late Anne Haney is his equal, guest starring as the elderly, no-nonsense judge.
The B story, a mystery that begins as a tangent of the A story and eventually joins back in, gives Odo some interesting scenes and allows the writers to conveniently duck the difficult questions the episode offers. That said, viewers still learn plenty about the Trill, which is really the whole point of "Dax". Sadly, it's the last Star Trek script with contributions from D.C. Fontana, who also contributed to the Original Series, the Animated Series, and The Next Generation.