Dragon Ball Z: Lord Slug, also known by its Japanese title Dragon Ball Z: Son Goku the Super Saiyan (Japanese: ドラゴンボールZ 超 (スーパー)サイヤ人だ孫悟空, Hepburn: Doragon Bōru Zetto Sūpā Saiyajin da Son Gokū), is a 1991 Japanese animated science fiction action-adventure film and the fourth Dragon Ball Z feature movie. It was originally released in Japan on March 9 between episodes 81 and 82 at the Toei Anime Fair as part of a double feature with the first Magical Tarurūto-kun movie. An American English dub was produced by Funimation and released to VHS and DVD on August 7, 2001.