S1, E1: Goku is a legendary warrior and the strongest fighter on the plant, but he’s about to encounter a foe from out-of-this-world. What brings this new menace to Earth? And what’s up with his tail?

S1, E1: Goku is a legendary warrior and the strongest fighter on the plant, but he’s about to encounter a foe from out-of-this-world. What brings this new menace to Earth? And what’s up with his tail?