The Deathless Devil (Turkish: Yılmayan Şeytan) is a 1972 Turkish action film, co-written, produced and directed by Yılmaz Atadeniz, starring Kunt Tulgar as a young man who takes up his father's mantle as masked crimefighter Copperhead to defeat the evil Dr. Satan. The film, which went on nationwide general release on October 1, 1972 (1972-10-01), was released in the US by Mondo Macabro in 2005 on a double-bill DVD with Tarkan Versus the Vikings. The film is a remake of the 1940 serial Mysterious Doctor Satan.