Clash in the Underworld
Killy returns to his old stomping grounds, but it turns out Docooga has upset the balance of power. Source: crunchyroll
Aired 25/09/1981EP 13 - Clash in the Underworld
1981
GoShogun
A meteor strikes the Earth and is found to emanate a powerful new energy called Beamler, which is used to power a battle robot, GoShogun, and a teleporting fortress, Good Thunder. The Docougar Crime Syndicate, lead by crime lord Neo Neros, try to steal the secret of the energy from the inventor of GoShogun, but he kills himself rather than let them acquire it. His son is targeted by Neo Neros next, but he is taken in by the crew aboard Good Thunder, who travel the world fighting NeoNeros's forces with GoShogun.
(Source: Wikipedia)