1975 | 7 Episodes

Season 1 of I Didn't Know You Cared premiered on August 27, 1975.

1976 | 6 Episodes

Season 2 of I Didn't Know You Cared premiered on April 20, 1976.

1978 | 7 Episodes

Season 3 of I Didn't Know You Cared premiered on January 11, 1978.

1979 | 7 Episodes

Season 4 of I Didn't Know You Cared premiered on May 8, 1979.