Willo the Wisp beech wood in Oxfordshire, near the director's home. Kenneth Williams provided voices for all of the characters. The principal narrator, Willo the Wisp, was a blue, floating creature drawn as a caricature of him, while the name refers to the ghostly light will-o'-the-wisp from folklore. The other main characters were Arthur the caterpillar (as a gruff cockney), Mavis Cruet, a plump, clumsy fairy with an erratic, magic wand, and the principal antagonist, Evil Edna, a witch in the form of a walking, talking television set who could zap people with her aerials. Other characters included Carwash, a snooty bespectacled cat
The Hanna-Barbera New Cartoon Series Reddy", "Huckleberry Hound" and "Yogi Bear" all of which had bridge animation between the cartoons.) available at the time. For example, WGN-Channel 9 in Chicago ran the three segments in a half-hour timeslot under the name "Wally Gator". In New York, WPIX-TV originally used the segments for a local series, "Cartoon Zoo", featuring Milt Moss as host and "Zookeeper", with life-sized cutouts of the characters in "cages" as a backdrop. The package was originally syndicated by Screen Gems, the TV division of Columbia Pictures. The Hanna-Barbera studio was later purchased by Taft Broadcasting Company, which distributed the studio's product first