Four episodes featuring Rainbow Brite and friends. In 'Mom', when Murky's mother arrives for an unexpected visit, he tries to trick her into helping him make Rainbowland gloomy. In 'A Horse of a Different Colour', as a diversion to kidnap Starlight, Murky builds a mechanical horse to run in the big race at the annual Sprite Fair. 'Queen of the Sprites' sees the Dark Princess and Count Blogg come to Rainbowland and convince the Sprites that she is their queen, and that they must mine magic diamonds for her in the Colour Cave. Finally, in 'Star Sprinkled', an intergalactic conman tricks the Sprites into signing over the deed to the Colour Cave, which she plans to turn into a visitor attraction.