The Japanese box art for Dragon Ball Z: Lord Slug.
Dragon Ball Z: Lord Slug, known in Japan as Dragon Ball Z: Sūpā Saiyajin da Son Gokū (ドラゴンボールZ 超サイヤ人だ孫悟空; lit. "Dragon Ball Z: Super Saiyan Son Goku"), is the fourth Dragon Ball Z movie. It was originally released in Japan on March 19th, 1991, between episodes 81 and 82, and later released in America by FUNimation Entertainment in 2001. Bridge Entertainment's title is Super Saiyan Son Goku. It is the first Dragon Ball Z movie (not counting the later Ultimate Uncut edition of the previous movies), but the third feature (the Bardock - The Father of Goku and History of Trunks specials were dubbed a year before), to be dubbed with FUNimation's English in house voice cast.