The Adventures of Sam Spade was a suspense/detective radio show starring Howard Duff (in the colorful title role along with Lurene Tuttle as his secretary Effie.  It was based on the private detective character created by Dashiell Hammett, well-known from the book and movie The Maltese Falcon.  The show ran from 1946 to 1951.  Duff was replaced by Steve Dunne in later episodes.The String of Death Caper: A dancer  hires Sam to find a beach comber. Sam not only finds him, but also comes up with a caper involving fabulous rose colored pearls and a murder or two...or three! Originally aired February 2nd,1951.Support the show (https://www.buymeacoffee.com/steviek)