“People love these experiences, and I think it tells you that there’s this appetite in markets that are probably a little underserved,” he notes, suggesting that there could be an “opportunity to expand” NBCUniversal’s immersive horror offerings going forward.

For his part, Miller says that he and Fallon are more than game to conjure up another batch of Tonightmares next Halloween.

“I would love it if this became our yearly thing,” the showrunner says. “Halloween has become this massive consumer event, and it wasn’t like that when I was a kid! The pumpkins went out, and that was it.”