Dragon Ball Z Kai (2009)

After winning the World Martial Arts Tournament, Goku lives peacefully with his family on Earth. But this peace is soon shattered by the arrival of a mysterious figure who claims to be Goku's long lost brother, Raditz, and that they are descendants of a warrior race known as the Saiyans, which fails to convince Goku to join him, leading to Raditz kidnapping Gohan and Goku teaming up with Piccolo to rescue him. This is a remastered version of the classic anime from 1989, with less filler content.