Three of radio's best gumshoes are on the case. First, Gerald Mohr stars as Philip Marlowe in "The Panama Hat" (originally aired on CBS on October 10, 1948). Then, Howard Duff is Sam Spade in "The Overjord Caper" (originally aired on CBS on June 5, 1949). Finally, we'll hear Dick Powell in "The Misplaced Laundry Case" from Richard Diamond, Private Detective (originally aired on NBC on September 6, 1950).