What we’ve got here are about 200 episodes in MP3 format of 1950’s science fiction radio dramas, “Dimension X” and “X Minus One.” These aided on NBC radio from 1950-51 and 1955-58 and featured stories written by the likes of Robert Heinlein and Ray Bradbury. I’ve only just started listening (having caught part of one episode on the radio late last night… presumably a station broadcasting recordings, rather than a small wormhole that’s letting radio signals from 60 years ago propagate through), and I’ve noticed the same titles popping up several times. I don’t know if those episodes are remakes or re-runs. But hey, they’re free, so do as I did and download ’em all.
Dimension X
X Minus One
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There are also these (so far I haven’t listened to any):
Dark Fantasy
This sounds a bit like the more horror-centric Twilight Zone.
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And then there are these two, which seem like screamingly-1950’s sci-fi fare: