DRAGON BALL Z KAI: PEACE FOR THE FUTURE! THE SPIRIT OF GOKU IS FOREVER

Special episode about Trunks going back to the future and fighting the Androids. Also known as episode 98 of Dragon Ball Kai. This episode was originally scheduled to air in Japan on March 27, 2011, but Fuji TV postponed its broadcast to air news coverage on the Tōhoku earthquake and tsunami. The episode was eventually released as an "extra" episode on Blu-ray and DVD in Japan on August 2, 2011. At this point the episode has not been broadcast in any subsequent re-runs of the series and is only viewable in Japan through home video releases. — Description from AniList community (anilist.co).