SyFy Portal has a decent interview with George Lefferts, a Hollywood writer and producer who once worked on Dimension X radio program:
Between them, [Ernest] Kinoy and Lefferts wrote over 40 scripts for “Dimension X.” Many were adapted from works by well-known science fiction writers, including Ray Bradbury, Robert Heinlein, Isaac Asimov and Kurt Vonnegut. Lefferts made a point of calling the authors to get their feedback. He also tried to stick as closely as possible to their original work.
Hmmm … can anyone tell me which Heinlein work was adapted to radio on “Dimension X?”
And isn’t it a shame someone like this guy wasn’t put in charge of “Stormship Troopers?”
[tags]George Lefferts,Dimension X,Ray Bradbury,Robert Heinlein,Isaac Asimov,Kurt Vonnegut[/tags]
Heinlein’s stories were used for both Dimension X and X-1. I don’t remember which stories were on which shows, but they included “Green Hills of Earth,” “Requiem” and “Universe.”
Dimension X also did a radio version of “Destination Moon,” a film which Heinlein co-wrote.
I’m pretty sure there were more of his stories adapted for radio. Old radio shows are available in many places online, if you want to hear them.