is the first episode of the fourth series (season) of the 2017 TV adaptation of The Worst Witch . It originally aired on CBBC in January 2020. Story Overview
Involves navigating a complex stone template or grid found in an abandoned tower room. [S4E1] The Three Impossibilities
A second riddle or grid that the girls must solve quickly. is the first episode of the fourth series
The "Three Impossibilities" are a set of tasks left by the very first Miss Cackle. According to legend, completing them undoes any spells cast on that day. [S4E1] The Three Impossibilities