Horror Express (1972), directed by Eugenio Martín, stars Christopher Lee and Peter Cushing. The story unfolds aboard the Trans-Siberian Railway, where a transported fossil reveals a deadly and intelligent organism. As the entity spreads among passengers, the situation escalates into a contained survival scenario with both physical and psychological consequences. Från IMDB: While on the Trans-Siberian Express, an anthropologist and his rival must contain the threat posed by the formers cargo: a prehistoric ape which is the host for a parasitic alien lifeform.