A widower and aeronautical engineer named Steven Douglas raises three sons with the help of his father-in-law, and later the boys' great-uncle. An adopted son, a stepdaughter, wives, and another generation of sons join the loving family in later seasons.

It's World War II and there is a severe housing shortage everywhere - especially in Washington, D.C. where Connie Milligan rents an apartment. Believing it to be her patriotic duty, Connie offers to sublet half of her apartment, fully expecting a suitable female tenent. What she gets instead is mischievous, middle-aged Benjamin Dingle. Dingle talks her into subletting to him and then promptly sublets half of his half to young, irreverent Joe Carter - creating a situation tailor-made for comedy and romance.

Recently returned from WWII combat, unable to find a job, finding his sweetheart engaged to another man, and generally aware of the changes which have occurred in his hometown while he was away, a young man becomes easily talked into joining the Ku Klux Klan. Banned by the Virginia Board of Censors, and financed independently because no bank would loan money for it.

A Broadway producer discovers new talent in a small Georgia town and brings them to New York for his new show.

Just as Charlie is running for mayor on a purity platform, an old flame threatens to show his torrid love letters to his wife if he does not withdraw from the campaign.