Old Martin Latimer is found dead in his home, a bullet hole in his chest. At first, it looks like a case of suicide, wherein the victim had rigged a Winchester rifle to go off with the tug of a string. But young Officer Harkness (played by a pre-"Davy Crockett" Fess Parker) suspects that Latimer was murdered--and with the help of some unexpected evidence courtesy of a "Lonely Hearts" photograph, Friday (Jack Webb) and Smith (Ben Alexander) track down the killer. This episode is based on the Dragnet) radio broadcast of August 16, 1951. ~ Hal Erickson, Rovi