The mysterious narrator claimed; "The Shadow knows" and then announced the story from the current issue of the crime magazine with a menacing laugh.
Though the program was canceled after 52 episodes, The Shadow became an immediate hit with the listening audience and continued on with his own magazine.
The Shadow came back to the airwaves to narrate other crime programs, such as, "Blue Coal Mystery Revue and a handful of his own short lived shows that aired on CBS in 1932 and 1934.
John La Curto, Frank Readick, Jr. and Robert Hardy Andrews voiced the character during these earlier attempts when the invisible avenger proved that, "Crime does not pay."
On September 26, 1937, Street & Smith finally gave The Shadow a central role, and a long-time radio residence, on the Mutual Broadcasting System network. The first show, starring Orson Welles, was titled "The Death House Rescue." The last radio program featured Bret Morrison portraying the mysterious sleuth. It was titled "Murder by the Sea," and aired on December 26, 1954.
Below is "The Shadow" radio show disambiguation page. It serves to clarify the difference between several of the radio programs in which The Shadow either narrated or starred in as a central character.