1967 | 24 Episodes

Season 1 of Mannix premiered on September 16, 1967.

1968 | 25 Episodes

Season 2 of Mannix premiered on September 28, 1968.

1969 | 25 Episodes

Season 3 of Mannix premiered on September 27, 1969.

1970 | 24 Episodes

Season 4 of Mannix premiered on September 19, 1970.

1971 | 24 Episodes

Season 5 of Mannix premiered on September 15, 1971.

1972 | 24 Episodes

Season 6 of Mannix premiered on September 17, 1972.

1973 | 24 Episodes

Season 7 of Mannix premiered on September 16, 1973.

1974 | 24 Episodes

Season 8 of Mannix premiered on September 22, 1974.