 "Dark Frontier" goes deeper into the Borg story "via" Seven of Nine's human family, the Hansens.When split into two parts, "Dark Frontier, Part I" was directed by Cliff Bole, and "Dark Frontier, Part II" was directed by Terry Windell.This episode is noted for a heist plot device, in which Voyager plans to make off with Borg tech, and also for expanding the character story of Seven of Nine.