The Mysterons seek revenge for the destruction of their Martian base. Their target? No less than the Director General of the Asian Republics. Can Spectrum foil the Mysterons, or will Earth suffer the loss of a great leader
The Mysterons make their first mistake when Captain Black, revealed to have become a Mysteron agent, breaks into the Culver Atomic Centre and is exposed to radioactivity that will enable Spectrum to track him with directional geiger counters.
Two new anti Mysteron weapons (Mysteron detector and gun) are developed from knowledge of the Mysterons. These are shown at a conference below an African hunting lodge. The Mysterons, however, have different ideas. When the Spectrum Intelligence discover Captain Indigo's in the hands of the Mysterons, Captain Scarlet tries to stop him. However, he has a time limit; Indigo has activated the lift mechanism and nicked the master key, trapping everyone below the lodge as the elevator can't be used at the same time as the lift mechanism. Can Scarlet get the key back and ...
When the Lunar Controller announces the Moon's independence from Earth in the war of nerves with the Mysterons, Scarlet, Blue and Green journey to Lunarville 7 to investigate reports of an unauthorised complex under construction in the Humboldt Sea.
Captain Scarlet and the rest of Spectrum are in a desperate race against time to defeat the Mysteron's latest threat. The total destruction of the massive desalination plant at Najama, high in the Andes Mountains.