Until We Meet Again?
On the final episode of Dragon Ball GT, The Eternal Dragon appears in the sky without being summoned and explains why the dragon balls cracked under the pressure of the minus energy. The unfortunate truth about what he must do next is revealed, and a glimpse into the future shows the power behind Shenron's final words.
Aired 19/11/1997EP 64 - Until We Meet Again?
Dragon Ball GT
Emperor Pilaf finally has his hands on the Black Star Dragon Balls after years of searching, which are said to be twice as powerful as Earth's normal ones. Pilaf is about to make his wish for world domination when he is interrupted by Gokuu Son. As a result, Pilaf flubs his wish and accidentally turns Gokuu back into a child.
After the wish is granted, the Black Star Dragon Balls scatter across the galaxy. However, Gokuu discovers that they will cause the Earth to explode unless they are all brought back within a year. Uniting with his granddaughter Pan and a young adult Trunks, Gokuu sets off on an adventure through the universe to find the Black Star Dragon Balls and save his planet from destruction.
(Source: MAL Rewrite)