One of the stories is an remake of earlier version of an Noggin the Nog: Noggin and the Ice Dragon. The other is an completely new story.
Like Ivor the Engine (1959), the series was colorized during the 1970s, due to the popularity of color television.
The new version of the Flying Machine was written by Oliver Postgate from memory, as he had mislaid his original script
Attempts to sell the series in Germany foundered (it was considered an insult to Richard Wagner's memory).