The Last Martian by Fredric Brown. NBC Radio science fiction program. X Minus One. 1955-58. Began as a retread of Dimension X. Some big name SF writers involved. “Known for high production values in adapting stories from the leading American authors of the era, X Minus One has been described as one of the finest offerings of American radio drama and one of the best science fiction series in any medium.”

https://en.wikipedia.org/wiki/List_of_X_Minus_One_episodes