Season 3 opens with Sisko wanting to try a different tack instead of waiting for the Jem'Hadar to attack; he wants to take a new class starship to try to search for the Founders.
Everything begins small, but this year features major revelations and developments for certain characters and ends with another cliffhanger of sorts that really lets people know that the series is going down a darker path than its predecessors.
Past Tense offers is classic Trek, even when it's gleefully contradicting and ignoring genre tropes. Think of it as the anti-'City on the Edge of Forever.'
I've been disappointed with DS9 episodes before, but this must be the first time I felt let down because an entry was actually smarter than I was expecting.
Past Tense was notable for depicting racism not from the perspective of a well-meaning white liberal, as seen in previous iterations of Star Trek, but through the eyes of people of color directly threatened by violence and indifference.