Sebastian is an undisciplined mathematics genius who works in the "cipher bureau" of the British Intelligence. While cracking enemy codes, Sebastian finds time to romance co-worker Rebecca Howard.
Tom Rath (Gregory Peck) is a suburban father and husband haunted by his memories of World War II, including a wartime romance with Italian village girl Maria (Marisa Pavan), which resulted in an illegitimate son he's never seen. Pressed by his unhappy wife (Jennifer Jones) to get a higher-paying job, Rath goes to work as a public relations man for television network president Ralph Hopkins (Fredric March). Drawn into poisonous office politics, Tom finds he must choose his career or his family.
James Mason and his wife Pamela read sections from the bible that lead up to the birth of Jesus. James Mason then visits his daughter in bed and their discussion leads into an enactment of the Nativity starring a cast of children.
In 1908, lonely middle-aged spinster Janet reluctantly bids farewell to a young relative, a schoolboy, who has spent a brief holiday with her. Janet, who is the author of children's adventure stories, longs for the company of children, and one day is surprised to see a little girl playing in her garden. The child is hungry and inadequately clothed, and Janet takes her into the house, determined to keep her. The next day the police enquire throughout the neighbourhood and call at Janet's house. She conceals the fact that she is hiding the child. Later, the local parson calls and tells Janet that Mrs. Star, a widow and the mother of the missing Sally, is not only heart-nroken but a very sick woman.