Dragon Ball Z: Lord Slug, also known by its Japanese title Dragon Ball Z - Super Saiyan Son Goku, or its UK English title Super Saiya, Son Goku, is the fourth Dragon Ball Z feature movie. It was originally released in Japan on March 19, 1991 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, 2004. Two other English dubs were also produced, one in France by AB Groupe done for European markets, and another one for a Malaysian VCD release, both with unknown casts. This is the first Dragon Ball Z movie to be dubbed with Funimation's English voice cast, and also the first to have songs by bands replace the original Japanese score. It was later remastered and released in a Double Feature set with Tree of Might on Blu-Ray and DVD on May 27, 2008. The film was released to DVD again on November 1, 2011 in a remastered box set containing the first five Dragon Ball Z movies.