Dragon Ball Kai
A Hard-Fought Dawn... The Star of Hope is Piccolo's Home (1x17)
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Goku begs Krillin to spare Vegeta's life, allowing Vegeta to escape Earth. Bulma, Roshi then come on the scene to find Goku, Gohan, Yajirobe, and Krillin. Mourning the loss of their other friends, Krillin explains that the warriors may find Dragon Balls on Piccolo's home planet, Namek. With help from Kai-o, Goku and friends decide to go to Namek to find the Dragon Balls so they can wish their friends back to life.