CBS Radio Mystery Theater was a
radio drama series created by Himan Brown that was broadcast on CBS affiliates
from 1974 to 1982.
I remember listening to these
shows when I was a kid. There are 1399 in all. They are available on
the web in many locations. Most have been edited to remove commercials but
some still contain not only commercials but also news broadcasts. The hour
always stared with a CBS news broadcast. The recordings I have start with
news about Watergate in the very first episode.