Evil Edna puts a spell on Mavis the fairy, which results in her having two faces. Arthur the caterpillar enlists the aid of a mole to try and reverse the spell and help his fairy friend.

Willo the Wisp first graced our screens in 1981 on ... Willo was a sprite formed from gas, and other characters included Evil Edna, a witch shaped like a TV, Arthur the opinionated caterpillar ...

Evil Edna turns Mavis the fairy into a tree. With the help of a traveling salesman, Arthur and the other inhabitants of Doyley Woods decide to get revenge on Edna.