For the curious viewer: If you want the definitive Dragon Ball Z experience—the story of Goku, Gohan, and Vegeta without the padding of "Next time on Dragon Ball Z"—seek out the official Kai streams on Crunchyroll or Hulu. They are serviceable.

Dragon Ball Kai (released as Dragon Ball Z Kai in the West) debuted in 2009 to celebrate the 20th anniversary of the original series. It wasn't a new animation from scratch, but rather a "refreshed" cut of Dragon Ball Z.