Eine außerirdische Rasse namens Mysterions erweckt Menschen nach ihrem Tod wieder zum Leben und rekrutiert sie für ihre mörderische und vernichtende Art. Sie versuchen den Menschen durch Zerstörung und Attentate zu Schaden, doch es gab immer Captain Scarlet und seine Crew, die die Mysterions stets in ihre Schranken verwies.

在一百年以后的21世纪,那时地球上有一个"宇宙情报局(USS＝Universal Secret Service)",专门策划搜集宇宙间各星球之的情报,隶属其下的 "七彩谍报队"则负责保护地球人类的安全。该队以"云霄基地"为中心,经常对地球和外太空作例行侦巡任务,找寻可能对地球不利之阴谋份子。 在火星侦察中,发生了不幸事件。黑上尉误以为火星隐形人是敌人,而主动摧毁他们在火星的基地,导致火星隐形人(Mysterons)的统治者认为地球人具有敌意,企图侵略他们,于是主动在地球展开一连串报复性的攻击,不断发动心理性的神经战,于是"地球"与"火星"之间的间谍战自此揭开。

Los esfuerzos de una unidad de seguridad para proteger a la Tierra de una malvada raza alienígena.

Capitaine Scarlet (Captain Scarlet and the Mysterons) est une série télévisée d'animation de marionnettes (Supermarionation) britannique en 32 épisodes de 25 minutes, créée par Gerry et Sylvia Anderson et diffusée entre le 28 septembre 1967 et le 14 mai 1968 sur ITV. En France, la série a été diffusée à partir du 27 janvier 1993 sur M61.

Captain Scarlet and the Mysterons, often referred to as Captain Scarlet, is a 1960s British science-fiction television series produced by the Century 21 Productions company of Gerry and Sylvia Anderson, John Read and Reg Hill. First broadcast on ATV Midlands from September 1967 to May 1968, it has since been transmitted in more than 40 other countries, including the United States, Australia, New Zealand and Japan. Characters are presented as marionette puppets alongside scale model sets and special effects in a filming technique that the Andersons termed "Supermarionation". This technology incorporated solenoid motors as a means of synchronising the puppet's lip movements with pre-recorded dialogue.

Set in 2068, Captain Scarlet presents the hostilities between Earth and a race of Martians known as the Mysterons. After human astronauts attack their city on Mars, the vengeful Mysterons declare war on Earth, initiating a series of reprisals that are countered by Spectrum, a worldwide security organisation. Spectrum boasts the extraordinary abilities of its primary agent, Captain Scarlet. During the events of the pilot episode, Scarlet acquires the Mysteron healing power of "retro-metabolism" and is thereafter considered to be virtually "indestructible", being able to recover fully from injuries that would normally be fatal.