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.
Starring Fred MacMurray, Don Grady, Stanley Livingston, William Demarest, Barry Livingston, Tim Considine, William Frawley, Tina Cole, Beverly Garland, Dawn Lyn