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1969 • 6 Episodes
Season 1 of The Main Chance premiered on June 18, 1969
1970 • 13 Episodes
Season 2 of The Main Chance premiered on September 14, 1970
1972 • 13 Episodes
Season 3 of The Main Chance premiered on June 7, 1972
1975 • 13 Episodes
Season 4 of The Main Chance premiered on April 18, 1975