The Key

Tinto Brass's first major film since the notorious Caligula stars Frank Finlay as a man who is terrified of losing his voluptuous wife Teresa (Stefania Sandrelli) because he is unable to satisfy her sexually. He arranges for her to have an affair, by taking erotic photographs of her and asking her would-be lover to develop them. Meanwhile, he keeps abreast of her burgeoning relationship by reading her diary, in the full knowledge that she in turn is reading his. (Arrow Films)