is a 1971 Spanish drama film about a werewolf directed by Pedro Olea. It is based on a novel by Carlos Martínez-Barbeito.

Starring:

Alfredo Mayo, Amparo Soler Leal, Antonio Casas, Emilio S Espinosa, Fernando Sánchez Polack, Frank Braña, Inma de Santis, John Steiner, Jose Luis López Vázquez, Lorenzo Rodríguez, María Arias, María de las Rivas, María Fernanda Ladrón de Guevara, María Sánchez Aroca, María Vico, Modesto Blanch,

Genre:

Drama, Horror