Unlikely Alliance

In order to get Goku to join him, Raditz kidnaps Gohan and orders Goku to kill 100 Earthlings before the next day as proof that he really has joined the Saiyans. Goku tries to stop him, but not even he can stop his brother's power. Even though he's no match for him, Goku will do whatever it takes to save his son. Krillin and Roshi volunteer to join Goku and save Gohan, however Goku refuses. They both had died during the events of Dragon Ball, and while the Dragon Balls may grant resurrection, they can only do so ONCE. Suddenly, Piccolo appears and proposes that he and Goku temporarily team up in order to stop Raditz. He had seen Raditz's power while the Saiyan was looking for Goku, and he knows that neither of them are a match for this alien on their own, despite being a villain, Piccolo is wise enough to realise that even he cannot rule over a world slaughtered by the Saiyans. Raditz returns to the location of his landing pod, leaving Gohan imprisoned in it. His Scouter detects a large power level coming from Gohan, but ignores it thinking that it's malfunctioning. Using the Dragon Radar to find Gohan (who has one of the Dragon Balls on his hat) and Raditz, Goku and Piccolo arrive and remove their training weights, Raditz notes with some surprise that his Scouter has read an increase in their power, and now realises they had been fighting him before while handicapped.