Folge 18.

Live-action excerpts, newly re-mastered from surviving archive reels. Most of the original film from the series no longer exists, purged as usual in the way of big broadcasters, who thought they needed the shelf space more. Luckily, the animators saved their reference work-prints and other random bits of film. These aren't always in the best of condition, but they do offer fascinating glimpses into the production process.