In pursuit of Doc Terror, Ace and Jake manage to force the criminal genius to crash land in the vast African jungle. There, Terror and Hacker stumble across an underground remnant of prehistoric earth, and he sets out to create an army of dinosaur cyborgs. However, Jake and Ace find the cave and attempt to prevent the villain from destroying the present with the past! But first they must contend with the lizard-like race who inhabit this inner world, and who have fallen under Terror's control...

After Terror's borgs launch a raid to steal an energy enhancing device in Japan, Hacker is captured by the Centurions and put on trial for all his crimes. Hacker refuses to divulge any of Terror's secrets, and after Terror fails to rescue him from the authorities, Hacker is sentenced to life imprisonment on the Alcatraz asteroid prison. Hacker is then allowed to escape, to become bait to lure Doc Terror and his stolen energy enhancer into the open, ready to be dealt with by the Centurions.

Science Lesson: The space shuttle by Ace.