Richard Diamond, Private Detective is a radio show centered around a slick and sophisticated detective, Richard Diamond, who enjoyed bantering with his clients and entertaining his girlfriend, Helen Asher, more than his detective work. The show involved Diamond getting involved in dangerous and often violent situations while solving murder cases, but as a skillful and witty detective, he never got shot or seriously injured. His relationship with Lt. Levinson of the police force, whom Diamond often helped reluctantly, provided an element of humor in the show. Despite their on-and-off compatibility, the two characters were portrayed as the best of friends.

The radio show aired from 1949 to 1953, initially on NBC, then moving to ABC in 1951, and CBS in 1953. A total of 77 episodes aired, and the show's television adaptation starred David Janssen, known for his work in The Fugitive. The opening scene of the TV show often featured the legs of Mary Tyler Moore, who later became famous for her roles in The Dick Van Dyke Show and The Mary Tyler Moore Show. The radio series had notable sponsors like Camel cigarettes and Rexall, and some key names involved in the production were Virginia Gregg, Blake Edwards, and David Baskerville.

Sources: archive.org, wikipedia.org, otrcat.com