Miss Cackle’s evil twin sister shows up to steal her sister’s identity. Hardass teacher Miss Hardbroom (Diana Rigg) sneers and has a low tolerance for Mildred. Awful school bully Ethel Hallow ruins the choreographed broomstick flying display that the students put on in front of the Grand Wizard (Tim Curry) and Mildred is the scapegoat. Thankfully Mildred uncovers the fake Miss Cackle and the Grand Wizard (and his lame jacket, bat bowtie and cape the size of a hang glider) takes her flying. This was full of hammy overacting, bad songs, cheap ugly costumes, bad SFX and yet somehow inspired three awful TV series.