There was no shortage of private eyes during the Golden Age of Radio, but only one could carry a tune as well as he could crack a case. Dick Powell starred as Richard Diamond, Private Detective - the gumshoe who cracked wise, packed a punch, and crooned a song to his girlfriend every week. We'll hear Powell in three radio mysteries: "The Private Eye Test" (originally aired on NBC on March 19, 1950); "The Hatpin Murder Case" (aka "The Oklahoma Cowboy Murder Case" - originally aired on NBC on September 27, 1950); and "The Red Rose" (originally aired on ABC on March 2, 1951).