Adventures of the Gummi Bears

Season 3

Episode 12: The Knights of Gummadoon

When the castle of the knights of Gummadoon (a reference to Brigadoon) appears, Cavin is imprisoned as a spy. The Gummies only have until sunset to rescue him, as the castle only appears once every hundred years, but they also have to contend with Duke Igthorn, who plans to capture the castle.