X Minus One was a half-hour science fiction radio series broadcast from April 24, 1955 to January 9, 1958 in various timeslots on NBC. Initially a revival of NBC's Dimension X (1950-51), X Minus One is widely considered among the finest science fiction dramas ever produced for radio. The first 15 episodes were new versions of Dimension X episodes, but the remainder were adaptations by NBC staff writers, including Ernest Kinoy and George Lefferts, of newly published science fiction stories.
"The Dying Art Form: Great Old Time Radio Sci Fi"
This is an collection of Inner Sanctum Mysteries, an oldtime radio show from the 1940s and 1950s. If you love a good horror story, you'll love these. You get all these (and many others plus more of the same genre):
"Worth the listen if you know what you're getting."
Superman is in his Fortress of Solitude when Lex Luthor puts all of Metropolis in danger. Can Superman fly back to the city in time to stop Lex and save the day?
"DO NOT BUY THIS"
This is Orson Welles Les Miserables, an old-time radio show from the 1930s. If you love a good radio drama, you'll love these.