2068: Earth is at war with a bizarre Martian enemy - the Mysterons. Only Spectrum, the world security organisation, and its number one agent, Captain Scarlet, can hope to defend the planet against the invading aliens and stop the intergalactic war of nerves before the Earth is destroyed!
The Mysterons Spectrum's Captain Black bombs the Mysterons who gain control of his mind for dastardly ends. Captain Scarlet is caught in the crossfire but he is brought back to life with retro-metabolic powers making him indestructible! Winged Assassin Captain Scarlet must prove his invincibility when the Mysterons take control of a plane carrying a V.I.P. Big Ben Strikes Again A nuclear transporter goes missing in after the Mysterons threaten to destroy the capital. Manhunt Captain Black, Captain Scarlet's deadly nemesis, causes an alert when he penetrates the Culver Atomic Centre. Avalanche The Mysterons try to annihilate bases in the Outer Space Defence System. White as Snow Colonel White goes into hiding after assassination threats from the Mysterons.