The Worst Witch S00 E01 Cinderella in Boots

"Mildred Hubble spells trouble."

Cackle's Academy is staging a play for Christmas & Chief Wizard Hellibore is invited as Miss Cackle's special guest. Backstage all is chaos. Mildred is playing Cinderella, much to Ethel's annoyance who wanted the part herself. Now Ethel is determined that she will put Mildred out of action and take over the role of Cinderella herself!