Excitement, Mystery, Adventure, Suspense. These are all words to describe this episode. And while the notion of a five part episode may seem like an avant-garde concept for a children's show, in this case it works out.
The Treasure of the Golden Suns introduces the audience to Scrooge McDuck a wealthy, but cheap man. Later it introduces Huey, Dewey and Louie and answers the lifelong question what happened to Donald Duck. Although no one wants to claim that their kids are theirs (Donald is their uncle and so is Scrooge) later we are introduced to Webby and her Grandmother Mrs. Beakley (another young duck with no parents (?)). And of course most important but not least we meet Launchpad McQuack. This episode a large set of characters, including arch nemesis Flintheart Glomgold, re-occurring villains The Beagle Boys, and truly sinister character, El Capitan.
This episode sets the stage for what the series is going to do and where it's going to do. The heart of the show is treasure hunting. The show involves traveling to various locales along with some minor problem solving. Infused with some cheesy humor, likable characters, and great writing this is the beginning of something beautiful, and a sign of good things to come for the show.