Science Ninja Team Gatchaman (1972) : 1x24

Scientists from the ISO headquarters are murdered one after the other and Nambu orders the Science Ninja Team to act as bodyguards. The Science Ninja Team separate for their guard duty. During Ken's guard, he surprisingly meets Galactor's Ninja Blackbirds and follows them, but loses sight of them near an amusement park. At the same time, Jun and Jinpei are attacked by a Neon Giant which appeared accompanied by the sounds of a flute. In order to let the scientist escape, they offer themselves as bait, but fall off the street. Jun reports that the Neon Giant resembles the Indian statue standing before the amusement park where the Black Birds vanished. Because of that, the Science Ninja Team waits for the night and sneaks into the park to start investigating. Since Jun said that she heard the sounds of a flute, Ken follows a flutist who leads him into an underground base. It's Katse in disguise. Katse tells Ken that this night, Nambu will get attacked. Ken gets in contact with Joe and Ryu, telling them to hurry to Nambu's location, but he's caught in a pertinacious attack from the Black Birds. Before his eyes, Katse steers the Neon Giant with the flute's tune. When Jun and Jinpei intrude, Ken flings the flute away, and orders Jinpei to play on it. Through Jinpei's nonsensical tune, the Neon Giant overheats and explodes. The plan to asssasinate Nambu has failed.