"Mystery Playhouse" was a "catch-all" Armed Forces Radio anthology series that drew on programs from series such as "Molle Mystery Theater". Program 154 is from the CBS series "Inner Sanctum".
In this episode, "The Dark Chamber", originally broadcast December 11, 1945, a man and woman are kidnapped by an evil scientist and made the subjects of an experiment in fear.
Sounds like something that would happen on "The Shadow", doesn't it?
The show was transferred from original AFRS vinyl transcription.