Dragon Ball Heroes Universe Mission Prison Planet Arc Episode 1 English Subbed Episode Title:Goku vs. Goku! A Transcendent Battle Begins on the Prison Planet!.Episode Description:Goku and Vegeta's training with Whis and Beerus is interrupted by the arrival of Future Mai, who tells them that Future Trunks has been captured. A mysterious figure emerges, introducing himself as Fu; he tells Goku, Vegeta and Mai that Future Trunks is trapped on a world called the "Prison Planet", a planet where warriors from alternate timelines and dimensions fight as part of an experiment conducted by Fu...