It was a nightmare Liz was having. MB will post the Robservations quote and episode number in a day or two I guess.
This was Cassandra's final appearance on the show. I remember this as taking place after Vampilique's disappearance. I have always presumed that Angelique's spirit appeared as Cassandra because that was the persona in which she had cursed Liz.
I always found it strange that Cassandra was so mean to Liz since Liz resembled Naomi, the one person at Collinwood who had tried hard to be kind to Angelique.
G.