This moment from the DS9 episode Tacking into the Wind is very brief and subtle. Yet, it’s one of the most powerful scenes in the series with Casey Biggs and Nana Visitor handling it superbly. Damar is initially angry over Kira’s words. But then she shows regret on her face. And he opens his mouth almost as if he’s about to say something but stops. He just gives her a tiny nod of acknowledgement. And I always interpreted that as Damar understanding that given Cardassian history and his personal history, he really hadn’t been all that different than the Dominion.