Season 1
1957 • 12 Episodes
Season 1 of Richard Diamond, Private Detective premiered on July 1, 1957.
Season 2
1958 • 21 Episodes
Season 2 of Richard Diamond, Private Detective premiered on January 2, 1958.
Season 3
1959 • 18 Episodes
Season 3 of Richard Diamond, Private Detective premiered on February 15, 1959.
Season 4
1959 • 26 Episodes
Season 4 of Richard Diamond, Private Detective premiered on October 5, 1959.