The Strongest Warrior in All of History is Goku's Brother!

Goku and Gohan attend a reunion on Master Roshi's island, where Goku introduces his son to all of his old friends. The smiles quickly fade, however, as an unexpected visitor lands on the island, and for Goku the day becomes a reunion of a different kind. A powerful alien has arrived. It's Raditz, Goku's evil older brother! 

Piccolo's Trump Card! Gohan is a Crybaby

The situation looks bleak for Goku and Piccolo, as Raditz easily deflects every attack they send his way. But Piccolo may have a way to stop the sinister Saiyan. He's perfected a powerful new attack... the Special Beam Cannon! There's only one problem. Piccolo needs time to gather the energy for the blast, which means Goku will have to last for five minutes against Raditz alone!