In the scene in the holosuite at Vic's, the audience comprises of the show's crew and regular guest stars (out of makeup).
This episode marks the deaths of Mila (Julianna McCarthy), Damar (Casey Biggs), Weyoun (Jeffrey Combs), Kai Winn (Louise Fletcher) and Gul Dukat (Marc Alaimo) in that order.
With his death, this episode marks the (possibly) last appearance of Captain Benjamin Sisko.
Promotion: Lieutenant Nog
Avery Brooks (Commander/Captain Sisko) is the only actor to appear in all 176 episodes of the series.
Aron Eisenberg (Ensign/Lieutenant Nog), Marc Alaimo (Gul Dukat), J.G. Hertzler (Chancellor Martok) and Mark Allen Shepherd (Morn) are the only actors, besides the regulars, to appear in both this episode and the pilot "Emissary".
This is the first of two Star Trek series finales in which Jeffrey Combs (Weyoun) appears. The second is the Star Trek: Enterprise series finale "These Are the Voyages..." in which he plays Shran.
This was the final episode of Star Trek to air before the death of DeForest Kelley on June 11, 1999.
There was some talk that the final scene would be Benny Russell sitting outside a sound stage holding a script that read, "Star Trek: Deep Space Nine", essentially making the series, and all of Star Trek, a dream.
In the final moments of the episode, Colonel Kira asks Nog to begin cargo inventories - this was the first task performed by Nog after he had decided to join Starfleet. Sisko had him do this to see if he could be trusted. This was seen in the third season episode "Heart of Stone".
This is the only final episode of the spin-offs to be set entirely in the "present", at that time being the late 24th century.
Before the final episode aired, TV Guide printed a retrospective article declaring DS9 to be the best Star Trek series to date.
In the original draft of the script, Damar still went down with all guns blazing, but without any lines. Distraught at the thought of a death without words, Casey Biggs asked Director Allan Kroeker for permission to improvise, hence his final words of "Keep...". When asked at conventions, Biggs admits he had no idea of how he was going to finish the statement.
This episode is novelized in the novel "What You Leave Behind".
The D'ridthau appears to have been the intended name for the Romulan flagship during the Battle of Cardassia. It was not mentioned in filmed dialogue, and is only contained in the pronunciation key from the final script, the line containing its use having apparently been deleted. Its earlier use is implied by its use in the novel, where William Ross says "The Romulan flagship D'ridthau has been destroyed"; he does not mention the name of the ship at all in the line in the episode.
Although some of the battle scenes were new, a large portion were re-used from episodes such as Call to Arms, Tears of the Prophets, and Favor the Bold. An exploding Klingon Bird-of-Prey was actually re-used footage from Star Trek 6.
With a total of 46 appearances, Aron Eisenberg (Nog) appeared in more episodes than any other credited guest star.