On April 24, 1949, radio fans met Dick Powell as Richard Diamond, Private Detective. The only radio gumshoe who wrapped up his case of the week with a song, Diamond was one of the best sleuths to come out of the radio era thanks to scripts from Blake Edwards and the smooth, polished performance of Powell - an actor who could play both comedy and crime drama. We'll hear three episodes of the series: "The John Blackwell Case" (originally aired on NBC on December 17, 1949); "The Martin White Case" (originally aired on NBC on January 22, 1950); and "The Woman-Hating Killer" (originally aired on NBC on April 12, 1950).