In 1943, 1946, 1950-1951, and 1982 Nero Wolfe was aired on radio. Sidney Greenstreet was perhaps the most famous actor to play Nero Wolfe. The two earlier series have only one episode each available. nerowolfe.org
wikipedia
...Greestreet bio
The New Adventures of Nero Wolfe with Sydney Greenstreet as Nero Wolfe (1950). Listen to OTRadio Then Genre Detective mystery with Running time of 30 minutes heard in The United States on the NBC radio network.
Starring Sydney Greenstreet with announcer Don Stanley. Created by Rex Stout. Written by Alfred Bester. Directed by J. Donald Wilson. Produced by Edwin Fadiman.
Original airing October 20, 1950 – April 27, 1951.
There were 26 episodes of The New Adventures of Nero Wolfe. Based on Stout's principal characters but not his stories. It is regarded as the series that is most responsible for popularizing Nero Wolfe on radio.
ALAN'S HIDEAWAY "Episode 04"
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A mixed bag of Alan's favorite selections from his library secured at a
Mexican hideaway in the Sierra Madre's. A collection from the 1940's to
today....