Raddits Saga
The Raddits saga starts out with Raddits (Gokou's older brother) coming to earth to get Gokou to come back into space with him. Gokou refuses and Raddits take Gohan (Gokou's son). Gokou and Piccolo team up and go after Raddits. They fight him and after a long hard battle with the aid of Gohan, Piccolo and Gokou defeat Raddits, but Gokou dies as well. Piccolo tells Gokou's friends that Kami took him to the other world. Piccolo also tells Gokou's friends that Gohan has a lot of hidden power and that he will teach Gohan how to use the power before two more Sayins arrive on earth in one year.