The CBS Radio Mystery Theater brings us All Living Things Must Die for this episode.  The story was written by Mystery Theater regular Elspeth Eric, who wrote 115 other stories for the show, and also appeared as an actress on 13 episodes.  This one first aired April 29, 1974.

[audio:http://archive.relicradio.com/horror34//TheHorror335.mp3]

Download TheHorror335