Ep. 17: Dawn of a Fierce Battle! The Star of Hope Is Piccolo's Homeland!

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Before Krillin deals the final blow to Vegeta, Goku intercedes. He asks Krillin to allow Vegeta to live, as Goku wishes to train harder and challenge Vegeta again in honorable combat. Krillin reluctantly agrees and Vegeta leaves Earth. Master Roshi, Bulma, Chi-Chi, and Korin fly to where Goku, Gohan, and Krillin are. They gather their injured, and the bodies of their deceased friends, and set off to the hospital. Krillin informs them that Kami is a Namekian, and that the planet Namek should have more inhabitants able to create Dragon Balls. After brainstorming on how to get there in a reasonable amount of time, they realize that Nappa's space pod is still a working vessel. Bulma decides to run it through some tests and see if it's still viable. (Source: Wikipedia)