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 Maltese Falcon: Sleuth Sam Spade is drawn into a statuette riddle after his partner is murdered in 1928 San Francisco. Originally aired on BBC December 1984