When the actions of Japanese Prime Minisger Hideki Tôjô, et. al., made the concept of a Japanese hero--even as a sidekick--box-office poison, Kato was quickly changed from Japanese to Filipino by the producers of the original radio show. Hollywood apparently had greater foresight, however, and herein made him a Korean.
When the Black Beauty is moving on screen, the soundtrack contains the sound of a buzzing hornet. This hornet buzz was created by using a instrument called a theremin.
The Green Hornet's car, "'Black Beauty", is a 1937 Lincoln Zephyr with custom painted front and rear fenders.
Rackets tracked down and eliminated by the Green Hornet, Kato and The Sentinel include: faulty materials used in bridge construction, the same scam in tunnel construction, insurance fraud at a flying school, sabotage of a bus line and then of a trucking company, protection payments demanded through extortion of a dry cleaning business, election fraud, gun running, and protection payments again demanded, this time from the operator of a local zoo. The final criminal activity thwarted is the planned bombing of the newspaper offices of Britt Reid's The Sentinel.