Hercules the Invincible (Italian: Ercole l'invincibile) is a 1964 Italian Sword and Sandal film directed by Alvaro Mancori and Lewis Mann and starring Dan Vadis. It is the first of two directing credits for cinematographer Alvaro Mancori.The film is also known as Son of Hercules in the Land of Darkness; this title was for a series of similar films repackaged for television, The Sons of Hercules. The film reuses footage and music from Hercules and other films in the genre.