Dragon Ball Z: Lord Slug is a 1991 Japanese animated science fiction martial arts film and the fourth Dragon Ball Z feature film. 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 Taruruto-kun film. It was preceded by Dragon Ball Z: The Tree of Might and followed by Dragon Ball Z: Cooler's Revenge.