As he did in "Nightsisters," Dooku makes mention of an old allegiance with Mother Talzin, though the full nature of this association has yet to be revealed. "Long ago," presumably when he was a Jedi, Dooku helped Talzin out of some manner of predicament. Given Talzin's penchant for long-term planning, she may have been concocting this scheme since that day.

Talzin offers Dooku a rejuvenating beverage of blackroot. Fans of Willow will remember that blackroot puts hair on your chest, but you should never ever feed it to an infant.

The Zabrak species, represented in Star Wars by such memorable characters as Darth Maul, Eeth Koth and Sugi the bounty hunter, are a culture that has spread across the galaxy. Though many hail from Iridonia, their wide colonization efforts mean that many only associate themselves with the colony world of their birth. In the case of Maul's people, these Zabrak call Dathomir home.

When Maul first appeared, his striking striped patterning was quickly assumed to be an example of Sith heritage by many artists and writers. They are not exclusive or even derived from Sith, but are instead the markings of a warrior.

The look of a shirtless Darth Maul was first developed by concept artist Iain McCaig when the need arose to illustrate Maul for a Dark Horse Comics comic book. That design has since appeared in action figures. It defined the look of the shirtless Nightbrothers in this episode.

Aside from Feral, Savage and Viscus, none of the other Nightbrothers are named in the script.

The Nightsister incantation that empowers Savage is as follows: Geiss kan erde mak, harden ob stein, geiss kan lewf mak, krig ob blitz, geiss kan pire mak, blud loge raga, geiss kan vass byn, skol zum Asajj, erde-blitz-raga-byn, ede-blitz raga byn, erde-blitz-raga-byn, zum Asajj!

Savage's body armor is based on Roman armor, with thin metal plates that slide over each other for a greater range of movement.

According to concept art, Savage's spear can fire its tip.

Jedi Halsey previously appeared in the background of the Season Two episode, "Grievous Intrigue." Concept art at the time identified him as Jayfo Ong, and he later became known as Tukker Val Loo and Lev'loa before his final name, Halsey, was settled upon. The name is spoken aloud in the next episode, "Witches of the Mist."

Halsey and Knox re-use existing character geometry, but with newly textured finishes. Halsey is made up of Kit Fisto's body, while Knox's body is that of Bolla Ropal.