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.