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 Sinister Siren Caper: A beautiful redhead has drawn a line around six names in the phone book. The six are then murdered...one at a time! Originally aired March 16th,1951.Support the show