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