1966 | 28 Episodes

Season 1 of Mission: Impossible premiered on September 17, 1966.

1967 | 25 Episodes

Season 2 of Mission: Impossible premiered on September 10, 1967.

1968 | 25 Episodes

Season 3 of Mission: Impossible premiered on September 29, 1968.

1969 | 26 Episodes

Season 4 of Mission: Impossible premiered on September 28, 1969.

1970 | 23 Episodes

Season 5 of Mission: Impossible premiered on September 19, 1970.

1971 | 22 Episodes

Season 6 of Mission: Impossible premiered on September 17, 1971.

1972 | 22 Episodes

Season 7 of Mission: Impossible premiered on September 15, 1972.