After the worldwide success of Gatchaman - Battle of the Planets, Tatsunoko Production followed up with an exceptional string of unforgettable heroes: Neo-Human Casshern (1973), Hurricane Polimar (1974) and finally Space Knight Tekkaman (1975). It was the 70s, and the world was inflamed by a thousand year old martial art, Kung Fu, propelled to the forefront by the legendary Bruce Lee.