Shadow Galactica been played by two actresses, Haruko Yamaguchi and Megumi Wakamatsu. and appear only in Act 48 of the manga. Sailor Lethe is named for a naiad in Greek mythology, and for a river of the Greek underworld where dead souls go to forget their past lives before being reincarnated. Sailor Mnemosyne is named for the Titaness of memory, the mother of the muses, as well as another river in the underworld which brought remembrance and omniscience. Sailor Lethe has an attack called "Galactica Myosotis Alpestris", which she used to attack Usagi. Myosotis alpestris is the name of an alpine species
Barge of the Dead episode as part of a pitch for the "" episode "Soldiers of the Empire". The idea was initially rejected, but was revisited for "Star Trek: Voyager". Following the episode's completion, both Moore and Fuller left the series because of dissatisfaction with their lack of control over its direction, and the perceived absence of strong story arcs across multiple episodes. "Barge of the Dead" was one of several episodes that addressed Torres' strained relationship with her parents and her Klingon heritage. Scholars have offered a range of opinions on Gre'thor, with the setting and ideology compared to Norse mythology, Greek mythology,