1960 | 36 Episodes

Season 1 of My Three Sons premiered on September 29, 1960.

1961 | 36 Episodes

Season 2 of My Three Sons premiered on September 28, 1961.

1962 | 39 Episodes

Season 3 of My Three Sons premiered on September 20, 1962.

1963 | 37 Episodes

Season 4 of My Three Sons premiered on September 19, 1963.

1964 | 36 Episodes

Season 5 of My Three Sons premiered on September 17, 1964.

1965 | 32 Episodes

Season 6 of My Three Sons premiered on September 16, 1965.

1966 | 32 Episodes

Season 7 of My Three Sons premiered on September 15, 1966.

1967 | 30 Episodes

Season 8 of My Three Sons premiered on September 9, 1967.

1968 | 28 Episodes

Season 9 of My Three Sons premiered on September 28, 1968.

1969 | 26 Episodes

Season 10 of My Three Sons premiered on October 4, 1969.

1970 | 24 Episodes

Season 11 of My Three Sons premiered on September 19, 1970.

1971 | 24 Episodes

Season 12 of My Three Sons premiered on September 13, 1971.