 She is later found out by Mildred when Mildred comes to collect Tabby from her.Luckily, Mildred and co. turn Agatha and her coven into snails themselves.In the TV series, to tell Agatha and Miss Cackle apart, Agatha was depicted as wearing large, round glasses that greatly magnify her eyes (similar to Professor Trelawney from Harry Potter and the Prisoner of Azkaban).