Bad Blood (known in most international territories as Viper) is a 1994 American action film directed by Tibor Takács, starring Lorenzo Lamas, Frankie Thorn, Hank Cheyne, Joe Son and John P. Ryan. Lamas stars as a bitter ex-cop who, after losing his badge and serving time to protect his crook brother, is asked by their father and his ex—now the brother's girlfriend—to defend him once more against a powerful mobster he has defrauded. Like MDP's earlier Joshua Tree, Bad Blood mixes noir with Hong Kong influences, and it shares some personnel with that film.