Keen, Tracer of Lost Persons was one of radio's longest running shows, airing October 12, 1937 to April 19, 1955, continuing well into the television era.
The sponsors included Whitehall Pharmacal (as in Anacin, Kolynos Toothpaste, BiSoDol antacid mints, Hill's cold tablets and Heet liniment), Dentyne, Aerowax, RCA Victor and Chesterfield cigarettes.
The kindly Keen and his faithful assistant, Mike Clancy (Jim Kelly), entertained listeners for 18 years.
[3] Richard Leonard directed scripts by Barbara Bates, Stedman Coles, Frank Hummert, Lawrence Klee and Bob Shaw.
Al Rickey's band provided the background music, including the program's theme, "Someday I'll Find You", written by Noël Coward.