“It must be what’s been happening.”
Okay, so you know how once in every generation somebody in the Collins family needs to spend a night locked up in the spooky old room behind the magic door, and in the morning they’re either dead or they’ve gone irretrievably insane? Well, it turns out there’s a third option.
Eldest son Morgan Collins has undergone the ordeal, and during that surprisingly uneventful evening, he located a secret locked door that was hidden behind basically nothing, so why nobody had ever noticed it before I don’t know. Behind that door — easily accessed by banging on the cheap seventeenth-century padlock with something heavy, like one of the excess vases cluttering up the place — was a whole other part of the house, a secret passage with a set of stairs leading to who knows where.
Morgan apparently explored this secret-behind-the-secret area, and experienced I’m not sure what, which by morning had him sitting quietly in a chair, unharmed but in an odd mood. Now he’s walking around telling everyone he’s not Morgan, and making insulting remarks.
I feel like we were more or less promised some kind of supernatural upheaval after spending a couple episodes just waiting around until they opened the door again, and this doesn’t quite live up to their side of the bargain. But at least we don’t have a white-haired Morgan cringing and babbling about the Woman in White, so let’s go ahead and consider this a win.