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 Crab Louie Caper: Sam is hired to find out how an Italian crab- fisher was killed. Was it an accident or murder? Originally aired March 2nd, 1951.