Amanda Holden flies into The Worst Witch playing head teacher Miss Pentangle, whose school is taking part in the Annual Spelling Bee against Cackle's Academy.

Everyone is excited, all except Miss Hardbroom, who balks at hearing the rival school will be visiting Cackle's and that Mildred is one of the contestants. Miss Hardbroom is doggedly determined that the school will perform brilliantly and puts a strict training plan in place.

Miss Pentangle and her contestants arrive, but why is Miss Hardbroom so on edge? Miss Pentangle is everything Miss Hardbroom isn't - colourful, cheerful and friendly... but could there be more to Ms Hardbroom's competitiveness than meets the eye?

As the end of year exams loom, Miss Cackle's secret is still weighing heavy on Mildred's mind.