The Enemy 1965

Directed by Živojin Pavlović

An ex-soldier named Slobodan Antic, referred to by a friend as one of the last idealists, finds himself losing control over his own life when a man identical to him starts following him around, claiming to be a friend but behaving suspiciously. Before long his dealings with this doppelganger begin to cost him and his professional and romantic life grow more and more confused.