Premise: Goku and his friends fight to save the Earth from the last remaining members of an alien race. The Saiyans are heading to Earth intent on taking over the planet and Goku, the world's strongest fighter, prepares for battle against Saiyan warlord Prince Vegeta and his minions.
S04, E20 (First Aired: Jan. 1, 2012)
After the battle, Dende heals the injured and summons the magic Dragon Balls.
S04, E21 (First Aired: Feb. 8, 2013)
Trunks returns to the future to settle unfinished business; Goku adjusts to his new surroundings.