Aired in the 1950s, Planet Man radio show was a science fiction series produced by the Palladium Radio Productions. It told the story of Dantro, a planet man who came from an organization called the League of Planets, described as "the law enforcement body for peace and justice in the celestial world."

In the series, the headquarters for the operations of the said league was based on Planeria Rex. The League sends Dantro into the celestial world to fight or prevent any danger that may disturb the universe. Apart from the planet man Dantro, other important characters in the show were Dr. John Darrow, Engineer Slats, and Darrow's daughter Pat. All of them joined forces to fight villains like Marston, a Martian ruler who wanted to achieve interplanetary domination.

Although the episodes and their storylines were quite predictable, many listeners were still able to find the show funny and interesting. It became popular most especially in young listeners. Click here to read more about Planet Man