1957 | 12 Episodes

Season 1 of Richard Diamond, Private Detective premiered on July 1, 1957.

1958 | 21 Episodes

Season 2 of Richard Diamond, Private Detective premiered on January 2, 1958.

1959 | 18 Episodes

Season 3 of Richard Diamond, Private Detective premiered on February 15, 1959.

1959 | 26 Episodes

Season 4 of Richard Diamond, Private Detective premiered on October 5, 1959.