Jadzia finds herself on trial for a murder she didn’t commit—but that her Trill symbiont’s former host, Curzon, might have—leading to an ethical quandary over whether or not she can be held accountable for his actions.
Star Trek loves itself a “trial for a wrongly accused Starfleet officer” episode, and this is a solid one of those, but Deep Space Nine elevates the trope with this early exploration of Jadzia’s relationship with her past selves, not just on the ethical level of the premise but emotionally as well.