Radio was king, and "The Adventures of Superman" ruled the airwaves.

But with fascism vanquished, the Man of Steel set his sights on a different foe.

This is the story of how Superman busted the Ku Klux Klan.

- Because unless we stop this fiery cross clan now, they'll get you no matter where you go.

- The story starts with Stetson Kennedy, a journalist who infiltrated the Klan for the Anti-Defamation League.

- He wanted to melt the cultural glue that held the clan together.

- Thanks, Rick.

- No problem.

- That's Rick Bowers. - B-O-W-

- He wrote this book.

- "Superman Versus The Ku Klux Klan."

- But what does Stetson Kennedy have to do with Superman?

Remember, the Last Son of Krypton needed a new enemy.

- The producers of the radio show, on a very bold gambit, decided Superman would take on real-life hate groups.

- The creators of "The Adventures of Superman" used Kennedy's research to produce a 16-part series called

"The Clan of the Fiery Cross" - "The Clan of the Fiery Cross," where a great secret society pledged to purify America.

- The Superman producers went to the Anti-Defamation League, and said, "Authenticate our script. Provide us more information."

- It was a way to get the message out that no one else could get out just by telling horror stories.

- I am the Grand Scorpion of the Clan of the Fiery Cross.

- The Grand Rat, you mean!

- It exposed the clan as hate-mongers, but it also exposed the clan as a money-driven organization.

- I'm running a business, Rigs, and so are you!

We deal in one of the oldest and most profitable commodities on earth: hate.

- It was a break-through in American broadcasting.

Not only had they done this great public service, but they elevated themselves to the number one radio show for kids on air.

- Well, they're cowardly gangsters who operate at night, hidden behind sheets and hoods.

Their minds are diseased with hate.

No one is safe from them.

- I guess you could say that the white robes stood no chance against the Man of Steel.