Stream anime episodes online for free, Watch Dragon Ball Kai Episode 2 English version online and free episodes. Anime Episode guide, Chapter Dragon Ball Kai Episode 2 English dubbed The Enemy is Goku’s Brother?! The Secret of the Mighty Saiyan Warriors The stranger says that his name is Raditz and that he is Goku’s older brother. Goku cannot remember this, as he suffers from brain damage caused by a fall when he was a child. Raditz reports that he and Goku are of an alien race called the Saiyans and that he and Goku are among the last four remaining. He then asks Goku to join them in exterminating the population of Earth, taking Gohan hostage when Goku refuses. Piccolo appears and offers to help him defeat Raditz, Goku accepts his offer and together they follow after Raditz. Goku and Piccolo confront the Saiyan at his space pod’s crash site, but Raditz is not impressed and tells them that the other two Saiyans are even stronger than him.