NBC's Mystery Theatre began airing with much fanfare on September 7, 1943. The series promised stories from the greatest classical and contemporary mystery authors -- and production values to match. And it kept its promise. It was aided from the outset by the addition of an 'annotator'-- as it was described in the 1940s --named Geoffrey Barnes. The annotator served in the role of expositor, filling in on the plot development as necessary and providing a back-story when needed. The apparent distinction made between a narrator and an annotator, was a matter of degree. Mr. Barnes, a distinguished and celebrated amateur criminologist in his own right, was apparently on hand to help the listener analyze and understand the various mysteries and their underlying crimes within each script.
