(26 episodes) from September 1966 to March 1967. Lee and Williams also appeared as their characters in three crossover episodes of Batman, another William Dozier-produced television series. The Green Hornet introduced the adult Bruce Lee to an American audience, and became the first popular American show presenting Asian-style martial arts. The show's director wanted Lee to fight in the typical American style using fists and punches. As a professional martial artist, Lee refused, insisting that he should fight in the style of his expertise. At first, Lee moved so fast that his movements could not be caught on film, so he had to slow them down. During the show's production, Lee became friends with Gene LeBell, who worked as a stuntman in the show. The two trained together and exchange martial knowledge from their respective specialties. After the show was cancelled in 1967, Lee wrote to Dozier thanking him for starting "my career in show business". In 1967, Lee played a role in one episode of Ironside. Jeet Kune Do originated in 1967. After filming one season of The Green Hornet, Lee found himself out of work and opened The Jun Fan Gung Fu Institute. The controversial match with Wong Jack-man influenced Lee's philosophy about martial arts. Lee concluded that the fight had lasted too long and that he had failed to live up to his potential using his Wing Chun techniques. He took the view that traditional martial arts techniques were too rigid and formalised to be practical in scenarios of chaotic street fighting. Lee decided to develop a system with an emphasis on "practicality, flexibility, speed, and efficiency". He started to use different methods of training such as weight training for strength, running for endurance, stretching for flexibility, and many others which he constantly adapted, including fencing and basic boxing techniques. Lee emphasised what he called "the style of no style". This consisted of getting rid of the formalised approach which Lee claimed was indicative of traditional styles. Lee felt that even the system he now called Jun Fan Gung Fu was too restrictive, and it eventually evolved into a philosophy and martial art he would come to call Jeet Kune Do or the Way of the Intercepting Fist. It is a term he would later regret, because Jeet Kune Do implied specific parameters that styles connote, whereas the idea of his martial art was to exist outside