Dragon Ball: Episode of Bardock
English name: Dragon Ball: Episode of Bardock
Genres: Action, Adventure, Comedy, Fantasy, Sci-Fi
Type: Special, Episodes: 1
Aired: Dec 17, 2011
Studio: Toei Animation
Source: Manga
Rating: PG-13 - Teens 13 or older
Synopsis:
Shown at Jump Festa 2012, held in December, 2011.

Bardock, Goku's father, who was supposed to have died when Freeza's attack hit him along with the Planet Vegeta, was sent way back in time where the planet was inhabited by strange creatures. There, he meets Freeza's ancestor, a space pirate named Chilled, and fights him to protect the planet.

(Source: AniDB)