COMBATTLER V (Episode 1)

Deep down in the earth, a giant computer which was built in an underground sea by the spacemen who had come from the constellation Pleiades, is accidentally reactivated after 35,000 years of disuse by a meteorite, and a takeover of earth begins as programmed long, long ago, with the first step being to annihilate primeval earth creatures-now human beings.
General Garuda, the commander, is a robot made by the computer. He sends slave beasts, also awakened by the computer, to the surface of the earth.
Five young peosons-Hyoma, Daisaku, Juzo, Ko-suke and Chizuru-defend the earth and its human beings. They operate five machines which, in battle, combine into a huge powerful robot-Combattler V. The materialization of teamwork, it has various amazing weapons and destroys the enemy.