Inner Sanctum Mysteries was a popular old-time radio program that ran from January 7, 1941 to October 5, 1952. Its creator was Himan Brown, who later created the long-running CBS Radio Mystery Theater. It featured stories of mystery, terror and suspense told, in sharp contrast to shows like Suspense and The Whistler, with a broad tongue-in-cheek approach. A total of 526 episodes are known to have been produced, a great many of which are lost today.