Otello Toso

Upper-class geometry professor Juan and his wealthy, married mistress Maria José, driving back from a late-night rendezvous, accidentally hit a cyclist, and run. The resulting, exquisitely shot tale of guilt, infidelity, and blackmail reveals the wide gap between the rich and the poor in Spain, and surveys the corrupt ethics of a society seduced by decadence. (criterion.com)

A woman takes her ill husband's place in a smuggling ring and steals the heart of his partner.

After years at the Russion front in WW II, the Italian soldier Bruno returns home. But he receives an anonymous letter warning him that during his absence, his fiancée Gina has begun an love affair with Tullio, his friend and workmate at a printing office. When Gina finds out that Tullio himself has written that letter, she questions the ulterior motives of her lover. And then, another anonymous letter triggers dramatic events. (imdb)

An alien cyborg invasion threatens Earth, and one of them also gets involved in a love triangle involving a Bohemian painter and a scientist's fiancée.