Character mistake: When the Grand High Witch and her assistant enter her room while Luke gets the formula, they're wearing pointy shoes. Earlier, it was mentioned that witches never wear pointy shoes.
The Witches (1990)
1 character mistake
Directed by: Nicolas Roeg
Starring: Rowan Atkinson, Anjelica Huston, Jasen Fisher, Mai Zetterling
Revealing mistake: In the hotel meeting scene, the Grand High Witch tells the witches they can take their wigs off. When we see the newly bald witches, it is particularly obvious that only the foreground witches are ladies with bald caps - the rest of the witches are bald men. (00:30:10 - 00:31:00)
Grand High Witch: This stinking little carbuncle has had five hundred doses! Aha, we are having Instantaneous action.
Trivia: A lot of the witches who attend the Grand High Witches meeting are actually men dressed in women's clothing.
Question: When Miss Ernst says she wants Luke to be found, she screams that he must be eliminated, causing Miss Irvine to look shocked. Why would she react this way considering Miss Ernst's plan was to kill all the children in the world?
Answer: She probably didn't know about her master plan, just about turning kids into mice. Most likely she thought they'd be kept in locked cages and held prisoners.
During the meeting, Miss Ernst says that every child in England must be "Rubbed out. Destroyed." A clear indication that she was talking about killing the children after they get turned into mice but, Miss Irvine doesn't seem shocked or upset after hearing this.