is a Japanese mecha media franchise created by Ken Ishikawa and Go Nagai. An anime television series produced by Toei Animation was broadcast on Fuji TV from April 4, 1974, to May 8, 1975, with a total of 51 episodes. The manga was serialized in Shogakukan's Weekly Shōnen Sunday from April 7, 1974, to August 24, 1975, and was compiled in six volumes by Shogakukan and three volumes by Futabasha. Plot The plot involves three strong-willed teenagers: Ryoma Nagare, Hayato Jin and Musashi Tomoe, who pilot three specially designed combat jets (Eagle, Jaguar, and Bear) which can be combined into three different giant robots, Getter-1 (balanced and for flight combat), Getter-2 (fast and for ground combat), and Getter-3 (strong and for marine combat). They were assembled by Prof. Saotome, who conceived the Getter Robo project as a means of deep-space exploration. The Getter machine is powered by an energy source known as Getter Rays, which are the invisible manifestation of the pilot's willpower. It became instead Earth's first line of defense against the Dinosaur Empire, a civilization of reptile-like humanoids who evolved from the now-extinct dinosaurs that roamed the earth millions of years ago. They have lived many years underground after being forced to do so by getter ray radiation from space that did not affect the apes who evolved into humans; they now want to reclaim the Earth as theirs and destroy humanity. Volume list Shogakukan has compiled the series' chapters into 6 tankōbon volumes. The first four volumes compile the chapters of the Dinosaur Empire arc (equivalent to the Getter Robo anime story) while the last two volumes compiles the chapters of the Hundred Demons Empire arc (equivalent to the Getter Robo G anime story). The manga was re-released in 3 aizōban volumes by Futabasha in 2002. Futabasha edition Sequels and remakes Getter Robo G The last episode of the Getter Robo series showed the defeat of the Dinosaur Empire, but with a high price: the death of one of the Getter Robo pilots, Musashi Tomoe. It also introduced a new enemy, the Clan of the 100 Demons, who at that very moment were preparing an invasion of Earth from space. This would be the basis of a sequel with a new, improved version of the original robot, piloted by Ryoma, Hayato, and newcomer pilot Benkei Kuruma. The series, called Getter Robo G, would not be as long