Dragon Ball: Episode of Bardock is a three-chapter manga created by Ooishi Naho and based on the video game Dragon Ball Heroes. It features a spin-off scenario taking place after the events of the TV special Dragon Ball Z: Bardock - The Father of Goku, in which Bardock survives after his confrontation against Freeza and turns into a Super Saiyan. 

Shown at Jump Festa 2012 hold in December, 2011. 
Bardock, Goku's father who was suppose to die when Freeza's attack hit him along with the Planet Vegeta, he was sent way back in time, where the planet was inhabited by a strange creatures. There, after a while he met Freeza's ancestor, a space pirate named Chilled and fought him to protect the planet.

Dragon Ball follows the adventures of Son Goku from his childhood through adulthood as he trains in martial arts and explores the world in search of the seven mystical orbs known as the Dragon Balls, which can summon a wish-granting dragon when gathered. Along his journey, Goku makes several friends and battles a wide variety of villains, many of whom also seek the Dragon Balls for their own desires. Along the way becoming the strongest warrior in the universe. 
Part II of Dragon Ball is also known as "Dragon Ball Z" in North America. 
Note: Chapter count includes 519 regular chapters and 1 extra. (Volume 33's "Trunks: The Story").

Tags