I do have my doubts about Mary. I can't help feeling that a genuine white witch would not have agreed to appear as she did on Friday in something much like the traditional Hallowe'en witch's outfit — the hooded cloak and the broomstick. OK, so no doubt the producers wanted her to appear like that, but I think a genuine white witch would have resisted being presented in such a stereotyped way.
Then, too, there are her photographs that show her with a mad, wide-eyed stare — again playing up to the outdated stereotype of the witch.
Maybe one reason why she's seemed so unhappy is because she's acting a role that she feels uncomfortable with?
Anyone know her surname, by the way? And if she's an actress, what has she appeared in?
Edit: Written before I'd seen CK's post just above this one.