Writer Sera Gamble recalls that they “started with the idea of faith healers as scary creatures. There’s lots you can say about people who twist religion for their own good…” Gamble was surprised that the hot-button topics explored in the episode didn’t raise any red flags with the producers, studio, or network. “I kept expecting someone to say, ‘No, no, no’… but no one did. The put a lot of faith in us.”
Gamble’s co-writer Raelle Tucker had a similar reaction. “It’s so shocking. I am so surprised, I gotta tell you. Sera and I, when we were conceiving of it, were like, 'It’s not gonna happen. Let’s be realistic.’ And this is a mistake that all established writers make: you immediately start to question what you’re allowed to do on television before you really even try to do it. So we end up with kind of safe stories a lot of the time across the board on TV because we’re scared. We almost censored ourselves, but then we didn’t. And everybody seemed really passionate about this idea and wanted to put it on the air and nobody questioned it.”
Supernatural: The Official Companion Season One. Titan Books, 2007: 72-73.