The massive final scene was one of the last where physical studio models were used before complete transition to CGI for scenes of this kind. The last one was in the follow-up episode A Time to Stand (1997).
References The Rules of Acquisition #190: "Hear all, trust nothing".
In a captain's log entry, Sisko says, "As someone once said, 'These are the times that try men's souls." This quote is from "The American Crisis", the revolutionary pamphlet by Thomas Paine (after whom the starship USS Thomas Paine was named), published in 1776. In V (1983), a character says these same words while comforting another character.
Kira's comments about Odo's feelings establish that this episode takes place about a month after Children of Time (1997).
The brief shot of the Starfleet/Klingon task force seen at the very end marks the first appearance of the Akira-class and Steamrunner-class ships in a television Star Trek production. Both classes of ship were created for the theatrical production Star Trek First Contact.