I love Hammer Horror movies! They are my guilty pleasure, my best horror subgenre besides eighties golden era slashers and found footage movies. This is one of the best Hammer´s movies that this company made in its existence. Screenplay was written by Richard Matheson(I Am Legend), based on the novel by Dennis Wheatley and the movie was directed by Hammer alumni Terence Fisher. Christopher Lee stars as Duc de Richleau who tries to save his friend Simon and a girl Tanith from being sacrificed and turn into evil Satan´s servant, by cult led by Mocata played by Charles Gray. This is action packed intense horror with excellent car chase, infamous Goat of Mendes appearance, those who know their horror will remember exactly what I mean. Cast is excellent, story is quality horror, kind of Satanic panic movies that were made later in the seventies, so we can safely say this one was ahead of its time. If you are into exploring Hammer Horror movies, this is for sure gem from that house. Go check this one out.