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.
| Creator | N/A |
|---|---|
| Actor | Fred MacMurray, Don Grady, Stanley Livingston |
| Country | United States of America |
| Production | MCA Television |