Pilaf and the Mystery Force Dragon Ball : Season 3 Episode 2

Goku is enjoying traveling the world on the flying nimbus--that is, until his dragon radar is stolen while he is swimming. He must track down the thief and get it back so that he can find his grandfather's dragon ball. Meanwhile, Emperor Pilaf is trying once again to assemble the dragon balls. There is also a mysterious military force that is searching for the dragon balls.