"La Marca del Hombre Lobo" is a 1968 Spanish horror film directed by Ricardo Franco. The movie follows the story of a young man named Leon who is cursed to transform into a werewolf due to a bite from a wolf. As he struggles with his dual nature, he becomes a threat to those around him. The film is notable for its blend of traditional werewolf mythology and elements of Spanish folklore. It features themes of identity, fear, and the consequences of one's actions, making it a significant entry in the genre of horror cinema during its time.