Mildred and her friends try to join Ethel's Cauldron Club, but Mildred fails the initiation test. Fenella and Griselda, however, come to the rescue and the Dangerous Old Books Society - DOBS - is formed.
Cackle's Academy takes part in a radio quiz show against girls from the dreaded Pentangle's School. Miss Hardbroom refuses to have anything to do with it, but in the end she saves the Academy from humiliation.
It's time for the dreaded Third Year Witch Project. Nerves are frayed and unlikely partnerships forged. The final demonstration in the Great Hall nearly ends in disaster, but all the girls work together to make the day memorable.
Miss Hecketty Broomhead returns to Cackle's Academy to take over while Miss Cackle goes to look after her sick aunt. Her insistence on rigid time-keeping proves to be her undoing, and Miss Cackle is welcomed back with open arms.
Cackle's Academy is staging a Pantomime for the Christmas season. Needless to say there is as much drama off-stage as there is on, and only with the help of a certain amount of magic does the whole production end as it should with Cinderella getting her Prince.
Mildred discovers that there is something which she is not worst at - drawing. Ethel, however, who can't bear the thought of anybody being better than her at anything, is determined to thwart Mildred. She very nearly succeeds - but not quite!