This episode was nominated for an Emmy Award for Outstanding Costumes For A Series.
Final appearances of Seska, the Kazon, and the Captain Proton Holodeck Program.
This episode revisits periods on Voyager from the episodes Caretaker (1995), Basics, Part II (1996), Bliss (1999) (not Waking Moments (1998) because the lights are dimmed), Macrocosm (1996), Scorpion, Part II (1997) and Bride of Chaotica! (1999), as well as Stardate 49624 (between the events of Innocence (1996) and Tuvix (1996), The Doctor's time period in sickbay, a year prior to Future's End (1996) and the year 2394. Chakotay also mentions Janeway's regret about never learning to play an instrument, which she told him in Remember (1996).
The third time in the series Captain Janeway mentions her dislike for time travel (temporal prime directive), previously mentioned in episodes Future's End (1996) and Relativity (1999).
When Janeway asks about Captain Proton, Chakotay calls him the "savior of the universe," a line from the theme song to Flash Gordon (1980), the original version of which was the basis for Captain Proton.