On my android phone I have a free app that let's me stream thousands of shows free of charge. Called "old time radio" and it offers menus, you choose category, show, episode and listen. Not a radio broadcast of old shows. Not random or on their schedule. You just listen to anything when you want, any episode offered, anytime. Too bad ipad does not have that. Some good apps for streaming but they cost on ipad. Separate apps for each show.
You can get 11 CDs of Gunsmoke episodes from OTRR list I linked to earlier post.
I have those and Texas rangers. Like both.
I tend to listen to more mystery and crime, whistler, the saint (Vincent price), orson Welles programs, Boston Blackie, broadway is my beat, .....so many others in this area.
I want the twilight zone shows. Hard to get. Shadow is too. They are usually pay only.
Oh...superman. I do not have any of them. Great idea. Used to hear them on xm for a while.... Now I am on a mission for the man of steel. If you have a link to those episodes, let me know please. Found some on Internet archive.....
And some on
http://www.oldradioworld.com/