Double, Double, Toil and Trouble is a 1993 American Halloween made-for-television children's film. It stars Mary-Kate and Ashley Olsen as two adventurous little girls who discover that their Great Aunt Sophia has been trapped and cursed by her evil twin sister Agatha. On the 7th year of her imprisonment, Sophia will be doomed to the netherworld unless the curse is broken by the magical spell of twins. The film's title is part of the famous line spoken by the three witches in Shakespeare's Macbeth (Act IV, Scene I): "Double, double toil and trouble; Fire burn and cauldron bubble." Plot 7-year-old Kelly (Mary-Kate Olsen) and 7-year-old Lynn Farmer's (Ashley Olsen) parents, Don (Eric McCormack) and Christine (Kelli Fox), are deeply in debt and in danger of losing their home. During the Halloween season, they visit Christine's cold and cruel Aunt Agatha (Cloris Leachman) to ask for a loan, which is immediately refused. While the girls wait outside, they meet Agatha's grave digger (Wayne Robson) who tells them the story of Agatha's twin sister Sophia (also played by Cloris Leachman) who is trapped inside the house. He explains to the girls that Agatha's home once belonged to a powerful witch who, before being burned at the stake 200 years before, had hidden her moonstone, the rare gem which gave her power. As children, Agatha and Sophia, tired of being twins, heard the tale and began looking for the stone in hopes of using its power to no longer look like each other. Agatha found the moonstone but hid it from her sister and instead began using the magic it possessed to make her sister's life miserable. Years later on Halloween, Sophia and her fiancé George (Matthew Walker), now Agatha's butler, prepared to elope and begin their life together, but Agatha, out of jealously and rage, cast a spell that banished her sister into the netherworld through a mirror, which she keeps hidden in the attic. On the 7th year at midnight, this Halloween, the spell will become permanent and there will be no way for Sophia to be rescued. Back at home, Kelly and Lynn learn of their parents' financial problems. Christine expresses that if Aunt Sophia were still around, she would be able to help them. Knowing this, the girls begin a rescue mission to free Aunt Sophia before it is too late. The spell can only be broken by twins