A spacecraft crashes to the earth and a robot staggers burning from the wreck. Doctor Elefun contacts Astro, who rescues Goliath from the flames. Goliath is a mining robot from Mars, with his eyes on his chest. His head contains a neutron beam. Elefun has it removed for safety, but it is stolen. Goliath leaves and goes looking for his head, removing and trying on several other robot's heads. Daddy Walrus also searches for the head, discovering it being sold at a criminal auction...