<P> In The Worst Witch Saves the Day she once again saves the academy from the evil plots of Agatha Cackle who had sneaked into the school disguised as "Miss Granite". Although Agatha locks Mildred in a cupboard to ensure that she cannot interfere with Agatha's plans, Mildred escapes by turning herself into an ant and manages to warn the rest of the school . In The Worst Witch to the Rescue her holiday project, in the form of a spell to make animals talk, is stolen by the treacherous and sneaky Ethel Hallow, who also gets her banned from Miss Mould's art lessons after being falsely accused of turning her pot into five rattlesnakes . However, Miss Cackle and Miss Hardbroom soon learn that Ethel was lying after Mildred rescues her tortoise from a pine tree after Drusilla Paddock hid him there under Ethel's orders, the tortoise - whom Mildred names' Einstein' - able to speak after Mildred used him as a test subject for her spell, allowing him to serve as a witness to Ethel's actions . </P> <P> In The Worst Witch and the Wishing Star, Mildred's fourth year begins with her being named Lantern Monitor for part of the school, but her life is immediately complicated when a wish on a shooting star apparently leads to her finding a stray dog outside the castle . Despite the complications of his presence, Mildred swiftly becomes attached to the dog, whom she names' Star', and teaches him to perform some tricks on her broom, but Star's existence is exposed to the rest of the school when Ethel's attempt to find out Mildred's secret results in the destruction of the costumes Form Five were going to use for a broomstick ballet display as part of an upcoming inter-school talent contest . However, Maud and Enid convince Miss Cackle to let Mildred and Star serve as the replacement act, with the resulting display being so successful that not only do they win the talent competition, but Mildred is allowed special dispensation to use Star as her broomstick companion while keeping Tabby as a more general pet . </P> <P> In the 1986 TV movie, Mildred was played by Return to Oz star Fairuza Balk . It aired on both Central Independent Television and HBO . </P> <P> In the 1998 ITV TV series, Mildred was played by Georgina Sherrington . She was also played by Sherrington in Weirdsister College . Mildred made a brief appearance at the beginning of the first episode of The New Worst Witch as a successful witch escorting her equally clumsy cousin Henrietta "Hettie" Hubble (played by Alice Connor), to Cackle's Academy . </P>

Where does mildred hubble's magic come from