Mr. Keen Tracer of Lost Persons

<p> That kindly old investigator <I>Mr. Keen</I> sought missing persons and unraveled crimes longer than any other fictional detective ever heard or seen on the air. For 18 years (1937-1955) and 1690 nationwide broadcasts Keen and his faithful assistant Mike Clancy kept listeners coming back for more. The nearest competitor <I>Nick Carter Master Detective</I> ran for 726 broadcasts.</p><p> This definitive history recounts the actors and creators behind the series the changes the show underwent and the development of the Mr. Keen character. A complete episode guide details all of the program's 1690 broadcasts.</p>