Chance Meeting (1954)
ed Hutchens (Knight) is a code expert working in intelligence at the American Embassy in London. On a night out to the Royal Ballet at Covent Garden he meets a young woman named Anna (Versois), and the pair fall immediately in love. The problem is that Anna is the daughter of the Soviet ambassador in London. It is made clear to both that their relationship cannot continue in such a political climate, and their movements are constantly monitored by surveillance units from both sides.