The Centurions visit Oceania Research Station to observe the testing of a new device, a powerful cryogenic ray. Unfortunately, the centre has already been infiltrated by Hacker and Amber. Despite the Centurions' best efforts, the ray is stolen by Doc Terror's forces. Terror ignites the radioactive belt surrounding the Earth causing the planet's temperature to rise at incredible rate. With the resulting firestorm threatening to engulf the entire planet, Only Doc Terror holds the key to preventing this solar apocalypse, but he will do so only when he is made unconditioned ruler of the Earth. The Centurions try desperate tactics to prevent terror's plans, Max even resorts to disguising himself as the world president in an attempt to find Terror's base, almost getting himself killed in the process. The heroes eventually find terror's headquarters but end up as prisoners of the villain, who destroys their wrist communicators, cutting them off from Crystal and Skyvault. The heroes aren't be

A comet is sending out artificial signals, and the Centurions are sent to check it out. When it turns out to be hollow, they beam inside. Within, it seem barren... at least at first. But then, as the comet's true nature is discovered, a new danger emerges from the shadows, a feline creature with the ability to drain anything power-generated, including the Centurions' weapon systems... The trio attempt to evade the beast by beaming to Skyvault, but the alien hitches a ride, and begins a chain of events which could end in Skyvault falling earthwards! Unless the Centurions can think of a way to cage this animal, it will sink its teeth into the best meal he's ever had: Earth's energy resources!

A desert pipe-line convoy goes missing, and the Centurions are sent to track it down. Max is suspicious of General Amid, and checks out his office. He is soon attacked by Hacker, but escapes. Crystal, however fins out that the General is diverting all of the power from the geothermal pipe-line away, and she too goes missing in the desert, abducted by a giant cyborg worm. Crystal is taken prisoner by General Amid, and discovers that he is working with Doc Terror, transferring the energy from the geothermal plant to Dominion. The Centurions free Crystal, but have to find a way to defeat Terror's giant worm.

Mei Lee and her colleague Jason from Sealab, are exploring a recently-discovered underwater trench, the deepest ever found. Their sea-bubble comes under attack by a giant squid and loses contact with Sealab. Max is sent to rescue them, but he too is attacked and loses contact with Sealab. Ace and Jake are sent to NASA to use an experimental Venus Probe, as only the probe can withstand the pressure at that depth. Meanwhile Max awakens to find himself in the undersea city of Atlantis, ruled by Princess Diana. At NASA, Ace is reunited with his old Air Academy comrade Sean O'Connor, who still holds a grudge against him since they had an argument over a girl. Diana tells Max her civilization has survived for many centuries since the city sank, and that they want no contact with the surface world, so he, Mei Lee and Jason are to remain there forever. Seeking control over Atlantis himself, Diana's cousin Naro attempts to steal the Venus Probe, leaving Ace to defend the ship underwater, where

Jake has Crystal beam Ace back up to Skyvault, freeing him from the squid's clutches. Naro tells Jake and Sean that he intends to use the probe to take over Atlantis, and O'Connor agrees to help him. Meanwhile, Max and the two from Sealab escape from their confinement and look for a transmitter, but are stopped by Diana troops. Ace returns to Sealab, which engages its new force field to descend to Atlantis' depth. Max and the others escape from Atlantis and take Diana with them, but they are soon attacked by Naro's forces. Sean uses the Venus Probe to return to Sealab, where it is soon boarded by Naro and his followers. Jake escapes and beams outside Sealab, where he attempts to get on board. Sean reveals to Ace that he's still really on their side, and together they attempt to regain control of the base. Now working with Diana, Max and the rest of the Centurions try to defeat Naro's forces.

Science Lesson: Uranus by Ace.

New Centurions are recruited by the team and trained in the Centurion Academy, whilst Sealab develops new weapon systems for the original three. Meanwhile, Doc Terror makes contact with an alien computer called "Gog".

Doc Terror reflects on his past as his partner Hacker while he stows away on board Skyvault and seizes control of the station. Terror boards and begins coordinating his campaign of destruction, ordering Magog to begin full distribution of a vast, unending armada. John Thunder attempts to find a way of saving Crystal and everyone trapped on the station.

Thunder, now a prisoner of Gog and Terror, is rescued by Crystal when she is able to successfully escape and elude Hacker. The two however remain powerless to help the remaining Centurions on the planet fighting to take back New York from Terror's armies. Terror makes a stern demand to the members of the science council that rejected him years ago.

As the Strafers approach the falling space station, Crystal and John risk turning the computer's power back on to destroy them. In order to free Skyvault's computer from Terror's control, Ace uses the Orbital Interceptor to travel up to Skyvault with Dr. Wu's anti-viralizer ray, avoiding the station's self-defenses after being beamed aboard. Meanwhile, at Gog's island cybernetic hive, Terror has taken the World Council of Scientists prisoner, and shows them Gog's new Triad weapon to fight against the Centurions.

Doc Terror and Hacker rebel against Gog, managing to inflict a decisive blow against him. Gog travels to New York City, now inhabiting the Triad, a vessel equipped with incredible firepower. Only all five Centurions can save humanity from the wrath of this terrifying machine.