When Miss Macbeth overhears Vin teasing Katie because of her retainer, she gets an idea - she'll fit Vin with a horrible dental device that she'll control by remote. However, things go wrong very fast...
Macbeth hypnotises Soper by using the psychedelic patterns on a pair of butterfly wings. With the school principal incapacitated, she's now free to impose her own brand of discipline on the kids!