Visible in the background of Tash's command centre is the artificial life form from the episode Think Tank (1999).
This is the only episode to feature the word "Voyager" in the title.
As Seven of Nine's first regeneration cycle ends, after tying in her alcove to Voyager's library computer to be a cortical processing subunit, diagrams of several ships taken from the Star Trek Encyclopedia flash by on the display, including: an Academy flight trainer, a Jem'Hadar battle cruiser, an Intrepid-class starship, a D7 battle cruiser, a long range shuttle, the orbital office complex, and a Defiant-class Starfleet ship.
Aside from her return appearance in Fury (2000), this is the final episode of the series to reference Kes.