Although the character of Ensign Mulcahey (Todd Babcock) is mentioned in at least four other episodes of "Voyager," this installment marks his only onscreen appearance.
One's body armor has a design unlike any other Borg body armor. Aside from its unusual-looking composition, it has tubing at the ribs, legs and shoulders that glows blue every two seconds.
J. Paul Boehmer, who plays the Borg drone One, played Vornar in Tacking into the Wind (1999), an SS officer in The Killing Game (1998)/The Killing Game, Part II (1998), and Mestral in Carbon Creek (2002).
The small clips that One watches regarding the Borg Collective were clips from Scorpion (1997)/Scorpion, Part II (1997).
Images displayed while the drone assimilates information from Voyager's computer include two unnamed planets and schematics of the Phoenix warp ship, a Cardassian military freighter, a Galaxy-class starship, a DY-100-class sleeper ship, a K'Vort-class Klingon Bird-of-Prey, a D'Kora-class Marauder, a Romulan Bird-of-Prey, an Academy flight trainer, a Jem'Hadar warship, a Klingon D7 battle cruiser, a long range shuttle, an orbital office complex, a Defiant-class escort, a D'deridex-class Warbird, a Sovereign-class starship, and a Negh'Var warship.