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1966 • 7 Episodes
Season 1 of It's a Knockout premiered on August 7, 1966
1967 • 12 Episodes
Season 2 of It's a Knockout premiered on May 14, 1967
1968 • 13 Episodes
Season 3 of It's a Knockout premiered on May 12, 1968
1969 • 11 Episodes
Season 4 of It's a Knockout premiered on May 14, 1969
1970 • 14 Episodes
Season 5 of It's a Knockout premiered on April 30, 1970
1971 • 14 Episodes
Season 6 of It's a Knockout premiered on April 21, 1971
1972 • 14 Episodes
Season 7 of It's a Knockout premiered on May 19, 1972
1973 • 14 Episodes
Season 8 of It's a Knockout premiered on May 18, 1973
1974 • 13 Episodes
Season 9 of It's a Knockout premiered on May 3, 1974
1975 • 15 Episodes
Season 10 of It's a Knockout premiered on May 23, 1975
1976 • 16 Episodes
Season 11 of It's a Knockout premiered on May 21, 1976
1977 • 16 Episodes
Season 12 of It's a Knockout premiered on April 22, 1977
1978 • 16 Episodes
Season 13 of It's a Knockout premiered on April 21, 1978
1979 • 17 Episodes
Season 14 of It's a Knockout premiered on May 11, 1979
1980 • 17 Episodes
Season 15 of It's a Knockout premiered on May 9, 1980
1981 • 15 Episodes
Season 16 of It's a Knockout premiered on May 29, 1981
1982 • 15 Episodes
Season 17 of It's a Knockout premiered on May 28, 1982