Ellery Queen is both a fictional character and a pseudonym used by two American cousins from Brooklyn, New York: Daniel (David) Nathan, alias Frederic Dannay (October 20, 1905–September 3, 1982) and Manford (Emanuel) Lepofsky, alias Manfred Bennington Lee (January 11, 1905–April 3, 1971), to write detective fiction. In a successful series of novels that covered forty-two years, Ellery Queen served as both author's name and that of the detective-hero. Movies, radio shows, and television shows have been based on their works. The two, particularly Dannay, were also responsible for co-founding and directing Ellery Queen's Mystery Magazine, generally considered as one of the most influential English crime fiction magazines of the last sixty-five years. The Adventures of Ellery Queen radio show ran from 1939 to 1948, it was heard on ABC, CBS & NBC radio networks. Radio Series Link.
A complete episode guide and history of the radio program can be found in the book "The Sound of Detection: Ellery Queen's Adventures in Radio
" from OTR Publishing, 2002.