In an interview for the Netflix site Tudum, Ty Doran used a "Star Wars" analogy to illustrate how Cal and Angelina wield the duality of the Omega sapphire like the characters in George Lucas' universe used The Force for both good and evil. "As we get into the second half of Season 4," Doran said. "[Cal and Angelina] really become like Luke Skywalker and Darth Vader — the same, but different. They are the powerful ones, they are two sides of the same coin. They're deeply connected but on opposite sides."
Sapphire has long been believed to have protective and healing powers, and in Hindu mythology, sapphires make up the roots of the Kalpavriksha, or wish-giving tree. Some ancient Middle Eastern cultures believed that sapphires would not glow when worn by someone of impure spirit.
Series creator Jeff Rake said he was initially hesitant to give the gem such an important role in Season 4, but writers convinced him that sapphire's ties to religious and cultural mythology were in keeping with the show's theme and would not pull audiences away from the story they were trying to tell.
"If there's a billion people out there who believe in the myth of Noah, why can't there be a billion people watching television who can believe in the myth of the sapphire," Rake asked. "It's going to remain quite important all the way to the end."
