“We cannot ignore the fact that that hairpin was your mother’s.”
So, for starters, it’s not a dream. I know what a dream sequence looks like on Dark Shadows, and that isn’t what this is. Carolyn’s eyes are open, and she’s sitting on the couch. This is some kind of wide-awake Chromakey phenomenon that they apparently have in this parallel band of concurrent time when they want somebody to think about something, but they don’t have time to put her to bed.
In this weird green-screen memory mashup, Carolyn sees Angelique lying dead on the floor, after her murder at the infamous seance that Carolyn did not attend. And lying on the floor next to the remains, there’s the head of a hatpin. That’s the whole thing, not a lot to shriek about.
But Carolyn shrieks like she’s being attacked by parallel pig weasels, and Julia comes running.
“I remember it now!” Carolyn cries. “I know who murdered Angelique!” But the dream only told her something that she already knew, and it’s not a very interesting revelation. Also, it wasn’t a dream.