Duet is about as good a show as you are going to see. Eichmann in space, call it. The Cardassian file clerk hunted down for war crimes, with a reversal and then another reversal and then a surprise twist. Major Kira as the remorseful Irgun agent is fast becoming one of my favorite characters in all of Trek. Terrific stuff.
By far my favorite early DS9 episode. VERY powerful stuff.