TREKCORE > VOY > EPISODES > UNIMATRIX ZERO, PART I > Behind the Scenes

	Tom Paris is promoted back to Lieutenant junior grade in this episode, after previously being demoted to Ensign in the fifth season episode "Thirty Days".
	Mark Deakins appears as Axum, fresh off his role as Tournel in Star Trek: Insurrection. He was last seen on Voyager as Turanj, a Hirogen hunter in season 4's "The Killing Game".
	A Human woman seen in Unimatrix Zero states that she was assimilated at the Battle of Wolf 359. (TNG: "The Best of Both Worlds, Part II") Riley, a former Borg drone featured in the third season episode "Unity", made an identical claim. Also, in "Infinite Regress", one of Seven of Nine's extra personalities is a Human female who claims to have been taken by the Borg near the site of the Battle at Wolf 359. Marika Wilkaraha member of Seven's old unimatrix was a Bajoran Starfleet Engineering assimilated on the USS Excalibur durning Wolf 359 ("Survival Instinct"). Finally, in the movie Star Trek: First Contact, Jean-Luc Picard remembered that the Borg Queen was also present at the battle, even being present at his assimilation.
	The Delta Flyer is destroyed by the Borg in this episode. It will be replaced in "Imperfection" by the Delta Flyer II, which was of the same basic design and specifications.
	In this episode, the Doctor says Seven has had her first dream. However, she had dreams in "Waking Moments" and "One".
	One of the decapitated Borg heads is actually a mold of Brent Spiner's head which was used as Data's head in TNG: "Datalore", "Time's Arrow", "Time's Arrow, Part II".
	Janeway's line about having a headache last time she heard the words "my mind to your mind" is likely a reference to the episode "Flashback"
	The episode ends with Captain Janeway having been assimilated by the Borg. TNG: "The Best of Both Worlds" ended similarly with Captain Jean-Luc Picard having been assimilated as well.
	The original story, pitched by future Voyager and Enterprise staffer Mike Sussman, was to have featured the return of Seven's father, Magnus Hansen. In that version, it would have been revealed that the Borgified Hansen had managed to create a "cyber underground" where like-minded drones could meet and plan an insurgency against the Collective. Hansen would have called upon his daughter to help in their fight, giving Seven hope that her father might someday be liberated from the Collective, as she had been. The producers opted to pursue a romantic story for Seven instead of a father-daughter reunion.