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Karl Castle is a radio personality on National People's Radio.

Physical appearance

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Personality

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History

Scooby-Doo! (DC Comics)

He shared Terri Grass' hatred of Car Chat and helped her run a broadcasting truck to harass it and try to get it off the air. He ran off when she was caught as the Phantom of the Air. (Car-Tastrophe)

Appearances

Notes/trivia

  • His name is a parody of a real NPR radio personality, Carl Kassel, who appears on the show Wait Wait... Don't Tell Me!.
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