7x16 - Dark Shadows

Rachel is knocked unconscious by Jenny then locks her in the tower room. Dirk finds Nora outside Collinwood, who later claims she is waiting for her mother to return. Jenny starts wandering around the house. Dirk rescues Rachel from the tower room. Rachel tells Judith what has happened, denying that anyone was in the tower room. Judith finds Jenny who now has a sharp pair of scissors.