The Forbidden Fountain of Oz food, which occurs most famously in the "forbidden fruit" of the Tree of Knowledge of Good and Evil in the Book of Genesis, but in other contexts too. The idea of water that purges the drinker's memory is also ancient. In Greek mythology it occurs as the river Lethe: the souls of the dead lose their memories of their earthly lives by drinking its water. The same idea can also be found in Eastern and other literatures, as in the "Well of the Waters of Forgetfulness" and other guises. "The 'Drink of Forgetfulness' is found in Greek, Hindu, Norse, and
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,