The Inner Sanctum was a Horror mystery anthology radio program that ran from 1941 to 1952. It was famous for the creaking door opening and the guest stars. We have a couple Inner Sanctum episodes in our
Boris Karloff Radio Collection
There were 6 movies based on the show starring Lon Chaney, Jr. produced in the 1940’s.
Calling Dr. Death (1943), Weird Woman (1944), Dead Man’s Eyes (1944), The Frozen Ghost (1945), Strange Confession (1945) and Pillow of Death (1945).
Which are available in a boxed set