Eyeball 1975
Directed by Umberto Lenzi | Starring: Martine Brochard, John Richardson, Ines Pellegrini, Andrés Mejuto
A group of American tourists is traveling through Spain when two of them are murdered by a mysterious serial killer who removes an eyeball from every one of his victims. The tour presses on as the murders continue, with the travelers and the police trying to deduce which one of them is the killer.