4x20 - Dragon Ball Z: Dragon Box

Cell appears, seeking life essence, and continues to attack people. Kuririn happens to run into Cell, but when he challenges him, he winds up on the losing end. Just when things look critical, Piccolo and Tenshinhan arrive and rescue Kuririn! Then, at the Kame House, Goku finally awakens from his slumber and has made the grand resolution to go beyond even Super Saiyan.