If John had never broached the idea of ending the show, David, were you prepared to have a season four or beyond of “Penny Dreadful”?
Nevins: Absolutely. On its own merits this show would absolutely keep going if there wasn’t a creative reason to be done now.
But you knew this was the final season going into it, right? Can you talk about that?
Nevins: We deliberately made the decision not to announce going into season three this was the final season, because given where we knew the season was ending, that would have been a massive spoiler. It would not have felt like the right way to handle this show. If it had been a more conventional show, I think I would have given a little more warning to the audience. But it felt like, in this case, that was the obvious move, but not the bold move.
Source and more: Variety
When did you first know this would be the final season?
Logan: It was midway through season two, about two years ago when I was envisioning season three. I knew at end of season two that Vanessa Ives steps away from God and burns the crucifix and she’s left completely alone without the one thing that sustained her and the one source of strength she truly has — which is her faith. Since the show for me has always been about a woman grappling with God and faith, I thought the idea of her scratching her way back to God and finally achieving some some of apotheosis was the appropriate ending. As the season began to dance about in my head, I realized where it would it was going to have to go and have to end. I thought that was the right end and the graceful end for the character. I discussed it with Eva and then talked to David about where I felt the season was going.
Source and more: THR