 It s time for the presentation of the kittens - the black cat will sit decoratively on the end of each girl s broomstick when they fly. Mildred nearly doesn t get one at all, and when she does there are no black ones left, so she has to make do with a tabby. Meanwhile, Frank is looking after his nephew Charlie for a few days and brings him to the school. Charlie is fascinated by the girls but finds it hard to believe that they re really witches. When Ethel brags about her family portraits that adorn the walls, Charlie insults her lineage. He annoys her even more by asking whether boys can be witches. Of course Mildred and Ethel disagree. When Tabby can t even manage to cling onto Mildred s broom, Ethel lays into her about how hopeless she is. Mildred has been looking up spells in the library and, pushed too far, tries to turn Ethel into a frog - only to find a pig in front of her. The pig trots off, and the chase is on to catch it and turn it back into Ethel before Miss Hardbroom discovers what s happened - and Mildred gets into trouble once again! Charlie gets mixed up in all this by memorizing a simple reversing spell, which comes in handy when Mildred turns Ethel into a pig. When Frank brings Ethel to Ted s pig farm, Mildred and Charlie must rescue her before the farmer brings them to the market. Charlie manages to save the day, though not before the pig becomes a duck and Charlie becomes a donkey!