[s4e1] The Three Impossibilities -

Involves navigating a complex stone template or grid found in an abandoned tower room.

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 [S4E1] The Three Impossibilities

This final challenge is originally unreadable and ruined on the stone wall, forcing Mildred to use her ingenuity to figure it out before time runs out. Key Characters & Plot Points Involves navigating a complex stone template or grid

A second riddle or grid that the girls must solve quickly. Story Overview This final challenge is originally unreadable

The episode begins with Mildred Hubble and her friends returning to Cackle's Academy. After a botched potions experiment, Mildred's appearance is permanently transformed into a girl named . To reverse the spell before sunset, she must find and complete three legendary "impossible" challenges. The Three Challenges

If Mildred fails to complete the challenges by dusk, the transformation spell becomes permanent, and her old self will be gone forever.