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You can stream My Three Sons (1960) on Philo with a subscription.

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.

A widower navigates the chaotic trials of single fatherhood by relying on the steady wisdom of his father-in-law. This gentle sitcom captures the evolving dynamics of a household growing through adoption and new marriages.