Susanna Thompson, who plays Lenara Kahn, would later play the Borg Queen in several episodes of Star Trek: Voyager (1995).
Kira is shown wearing the Bajoran Militia dress uniform, its first appearance.
In the original version of the story, Kahn was a man. It was Ronald D. Moore who suggested making Kahn a woman.
Contrary to Jadzia's proclamation, she had actually twice previously let her past lives get in the way of her work, once in Dax (1993) and again in Blood Oath (1994).
Susanna Thompson has played four characters in the Star Trek franchise, the Borg Queen in Voyager episodes Dark Frontier (1999), Unimatrix Zero (2000), and Unimatrix Zero Part II (2000), Lenara Kahn in Rejoined (1995), Varel on The Next Phase (1992) and Jaya on Frame of Mind (1993).