This time on Orson Welles On The Air, we hear from The Black Museum.  The series first ran from January to December of 1952, this is the 12th episode, titled, The Door Key.
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The Diamond As Big As The Ritz by This Is My Best

Orson Welles had quite a career in radio, from his days as The Shadow and his Mercury Theatre On The Air, to the radio version of his Third Man character from the movie, and beyond. This podcast will replay his radio performances from his various series and guest appearances.