Recap / Star Trek Deep Space Nine S 03 E 04 Equilibrium
Meet the Dax no one was supposed to remember
Sisko has a dinner party, at which Jadzia plays a tune on a musical instrument, despite insisting that neither she nor any of the Dax symbiont's previous hosts had any musical ability. Shortly afterward she begins having violent mood swings and experiencing strange visions. She, Sisko, and Dr. Bashir go to the Trill homeworld, but their efforts to discover what is happening to her are stymied by the doctors there.