Both Armin Shimerman (Quark) and Nana Visitor (Kira Nerys) count this episode among their favorites.
The episode marks the first mention of the Shakaar resistance cell.
This is one of only a few DS9 episodes without a subplot.
Cinefantastique ranked "Duet" as the best episode of Star Trek: Deep Space Nine.
The intent of the episode was to establish the Cardassian Occupation of Bajor as a metaphor for the German atrocities under Nazism, during the 1930's until the end of WW II.