The Flying Fortress - Vanished! Dragon Ball : Season 3 Episode 4

Pilaf leaves the village with the dragon ball. Colonel Silver follows him, but Pilaf shoots down Silver's plane. Goku returns to the ruined village with Chi Chi, and they learn what happened from the Ox King. Goku leaves to find the dragon ball. He and Silver both track Pilaf to his underground desert fortress, where a battle ensues.