"There was also a little bit of Adderall stuff written, but I wanted to make sure that was really tracking, because Kai was getting more and more manic," he explained. "I think he was already bipolar, but throwing the Adderall in there really sort of amped it up to another level. And then I really liked… Kai has these great mandarin collar jackets, which I always thought was kinda cool and different, sort of cult-like, I guess. Those were oddly religious but not in the script, in a way."
In addition to Kai, Peters was told later in the season by Murphy that he'd be portraying various cult leaders from history, like Jim Jones, Charles Manson and David Koresh. Even though he had worked on AHS for so many years, there was a specific role he wasn't sure if he could handle when Murphy first approached him about it.
"All of the cult leaders were a challenge, but I remember when he first told me I was going to play Andy Warhol, I was just like, 'S**t,'" he recalled. "'I have to research that, I don't know anything about playing him. Can I play that? Is that going to be embarrassing? Am I going to flop it?' So, it was a challenge from the get-go, but I had a great time researching him. He's such a fascinating guy anyways, so it was cool to do that, but, yeah, I was pretty terrified."