An alien spacecraft hovers over Amzot, dropping mechanical pods onto the planet. Meanwhile, Dorno, Igoo and Gleep, on a mission to get firewood, see the robotic pod creatures as the pods open up and start attacking the trio. Mekkor and his army of robot invaders lands on Amzot - Mekkor buries himself underground, leaving his antenna above ground to direct his hordes of robot warriors. The robots keep overpowering the Herculoids until Zandor cuts off Mekkor's antenna with his shield - without his control, the robots fall, and break into pieces. Mekkor himself pops back up and Zok blasts him, saving the day.