The Man in the Gray Flannel Suit (1956)

Tom Rath is a suburban father and husband haunted by his memories of World War II, including a wartime romance with Italian village girl Maria, which resulted in an illegitimate son he's never seen. Pressed by his unhappy wife to get a higher-paying job, Rath goes to work as a public relations man for television network president Ralph Hopkins. Drawn into poisonous office politics, Tom finds he must choose his career or his family.