The series followed Henrietta "Hettie" Hubble, (Mildred's younger cousin), through her years at Cackles Academy. Mildred is seen in the first episode accompanying her cousin to Cackles, before magically returning home. Hettie quickly becomes friends with Mona Hallow (Ethel's younger sister) and Crescentmoon "Cressie" Winterchild. The new enemy of Cackles is filled by Belladonna Bindweed and the sidekick is filled by Cynthia Horrocks. Miss Hardbroom and Miss Cackle return, and are joined by new members of staff Caspian Bloom, Miss Swoop and Miss Widget/Miss Nightingale.
Episode 1
No overview available.
Episode 2
Cressie is going to fail her Broomstick Test. When she does, Hettie persuades Miss Cackle and Miss Hardbroom to let her try again. Mona and Hettie try to think of ways to inspire her confidence.
Episode 3
Hettie is sick of the traditional rules of Cackle's Academy, so she asks how the others feel as well. Most of the school feel the same way, so Miss Cackle lets the girls follow Hettie's rules for one day.
Episode 4
No overview available.
Episode 5
No overview available.
Episode 6
Hettie shows the wrong Bella an interesting book when she hungers for a potion that will do her homework for her.
Episode 7
End of term competition leads Bella to poison HB.
Episode 8
Hettie accidentally does a very famous broomstick trick whilst trying out for the Open Day Broom Formation. She takes all the glory, but then is thrown in the deep when Miss Cackle and Miss Hardbroom decide to drop the broom formation and expect Hettie to perform the trick for Open Day and in front of the last witch to do the trick, Araminta Hexley-Gore.
Episode 9
Pentangle's School is forced to share with Cackle's after their school floods, causing fights between the two schools.
Episode 10
No overview available.
Episode 11
Hettie rediscovers the "Black Hole Club" and Belladonna and Cynthia push their way in, to the dismay of Hettie, Mona and Cressie. Belladonna causes chaos with the Book of Trivial Magic and soon things become desperate.
Episode 12
Cressie discovers she is a Time Witch, a witch that can tamper with time, so Hettie pressures her to go back in time with her to patch a falling out with Mona.
Episode 13
Belladonna's granny Bindweed and Miss Cackle's twin, Agatha try to take over the school yet again by using the End of Term prize, the very powerful Golden Broomstick.
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