Dashiell Hammett's hard-boiled detective steps out of the pages of The Maltese Falcon and into his own radio show, with Howard Duff trading wisecracks with Lurene Tuttle's perfect secretary Effie. In this fourth broadcast from August 2, 1946, a Dr. Gregory Denolph hires Sam to recover some letters that could incriminate his patient, the famous actress Constance Brent. But when Spade arrives at the doctor's office, homicide is already calling Denolph's death a suicide -- and the doctor's widow is convinced it was murder, with Constance as her prime suspect. A breezy, twisty caper from one of radio's wittiest detective shows -- the Edgar Award-winning series that helped define the noir comedy formula.