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 Calcutta Trunk Caper: Sam Spade receives a visit from Marsha Hopkins who tells him that she is dreadfully worried about her sister Miss Constance Pendleton who has become involved with a scoundrel and is planning on marrying him. Miss Hopkins knows that this man is only interested in her Constance's money and is convinced that after the ceremony he is going to kill her. Originally aired June 8th,1947.

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