"Broken Link" is unique for a Star Trek season finale as the story for the episode came from a freelance writer, George A. Brozak, rather than the writing team.
Leslie Bevis' character is finally named in the script for this episode: Rionoj. Bevis previously appeared as the character in the season two opener The Homecoming (1993), and in the season three episode The Abandoned (1994).
The comment Garak makes about Chalan Aroya's dress ("a thing of beauty is a joy forever") is from Book 1 of Endymion by John Keats, who is also mentioned in "The Muse".
Reportedly, a German-dubbed version mistranslated two crucial lines with hilarious results. Odo to Dr. Bashir during a physical exam: "You don't know enough about our physiology!" became "You don't know enough about our philosophy!" Klingon Chancellor Gowron: "Our claim to Archanis is indisputable!" became "Our claim to Archanis is inscrutable!" Inskrutabel (inscrutable in English) has the dictionary definition of "impossible to understand or interpret."