X Minus One.
X Minus One is widely considered among the finest science fiction dramas ever produced for radio. Initially a revival of NBC’s Dimension X (1950–51), 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 by leading writers in the field, including Isaac Asimov, Ray Bradbury, Philip K. Dick, Robert A. Heinlein, Frederik Pohl and Theodore Sturgeon, along with some original scripts by Kinoy and Lefferts.
Episodes of the show include adaptations of Robert Sheckley’s “Skulking Permit,” Bradbury’s “Mars Is Heaven,” Heinlein’s “Universe” and “The Green Hills of Earth”, ” Pohl’s “The Tunnel under the World,” J. T. McIntosh’s “Hallucination Orbit,” Fritz Leiber’s “A Pail of Air” and George Lefferts’ “The Parade.”
gadreel23 has posted some of the stories on youtube with, I think, Sims character animations to give the narration some visuals. I’m not sure if this is right, but you can always minimize the window and just listen.
Here’s a list of episodes