Asklepios makes an ancient missile launch control center operational again, so Kortan gives Quentin's clan an ultimatum - either they deliver Quentin to him within 12 hours or they will be annihilated. The series ends on an open ending.
Ramirez takes Quentin to see the Sandman, a tormented Immortal once known as Prometheus, who possesses the forbidden knowledge of atom and nuclear weapons. Kortan tries to get to him first and kill him to absorb this knowledge.
The trio travels to see Brana, the Immortal who possesses the knowledge of linguistics and Earth's languages. Unfortunately, Arak raids Brana's village and takes the woman he loves for himself. Brana asks the trio for help.
While searching for Yoshoda, a powerful Immortal who has the knowledge of martial arts, spirituality and illusion, the trio is joined by a mysterious teen who convinces Quentin to give up on his search for knowledge and become a warlord.
Kortan leaves Asklepios in charge for a day. Meanwhile, the trio must infiltrate Kortan's nuclear power plant that provides Mogonda with electricity to rescue Volta, the Immortal who possesses the knowledge of nuclear energy.
General Kirk sends Kortan's conditioned Anomas against the rebels in Mogonda's shantytown. In retaliation, the rebels bring wild Anomas into town. Immortal Mahata gives his knowledge of entomology to Quentin, who tries to end the carnage.
NASA's space shuttle returns to Earth after 700 years and crash-lands. Kortan's sleazy Immortal friend Emerson who knows the secret to invisibility is the only survivor. Kortan gets to him before the trio.
Arak's forces have the Dundees cornered. Ramirez helps them organize defenses which buys the clan some time. The trio and a couple of clansmen then leave for Mogonda to create a diversion even Kortan and Arak can't ignore.
Haunted by a recurring nightmare in which he fights Kortan, Quentin decides to go to Mogonda alone and deal with Kortan once and for all. However, he finds allies among Mogonda's shanty town people and they try to steal Kortan's sword.
While raiding "451opolis", a concealed town founded by a deserter from one of his slave hunter squads, Arak finds a huge library. Since Kortan has banned all books, he plans to burn it down. Can Ramirez stop him?