Captain Black (Captain Scarlet)

In 2068, Black is seconded to command the Zero-X spacecraft for a manned mission to Mars, assigned with investigating anomalous radio signals detected by the Spectrum Organisation. Previously, Earth was aware only of the existence of rock snakes on the planet (as seen in the 1966 film Thunderbirds Are Go); consequently, Black is alarmed to discover a fully developed, extraterrestrial city on the Martian plains. When the inhabitants – a collective, intangible, artificial intelligence calling itself "the Mysterons" – rotate scanning apparatus towards the Martian Exploration Vehicle (MEV), Black misinterprets the attempt at peaceful first contact as preparations for an attack; believing the Mysterons to be hostile, he orders his subordinates to fire on and destroy the settlement. The Mysterons subsequently use their power of "reversing matter" to reconstruct the city, declare a retributive “war of nerves” against Earth – the first act of which will be the assassination of the World President. Asserting that ‘one of you will be under our control’, Black subsequently undergoes a dramatic change of appearance as he sits at the controls of the MEV, his expression hardening and his face becoming pale. After Zero-X returns to Earth, Black disappears. Although never specifically stated in the series, this points to Black being in fact not a Mysteron reconstruction but still human, one under telepathic control of the Mysterons. His “unwarranted act of aggression” results in his transformation into the principal instrument of the Mysterons' campaign of vengeance against Earth.

Through Black, the Mysterons relay instructions to their reconstructed intermediaries, while compelling him to undertake acts of murder and terrorism through their deep, disembodied voice (in which Black now also speaks). Black’s unique position is of clear importance to the Mysteron cause and thus elevates him above any of their other agents. This is evident in the episode "Manhunt"; after becoming a radiation hotspot through accidental exposure, he can then be tracked by Spectrum. Capturing Symphony Angel while evading their ground forces, he deliberately subjects her to radiation inside an atomic centre, but does not kill her and allows her to escape. Spectrum officers give chase to the Spectrum Pursuit Vehicle that they believe contains Black, but is in fact being driven (badly) by Symphony. His ruse a success, Black decontaminates himself and makes his escape. Captain Blue's surprised remark of "So he is alive!" when he sees security camera footage of Captain Black implies that until then they thought he was dead. In various episodes, like "The Mysterons" and "Point 783", he demonstrates the ability to filter out his voice while speaking so only other Mysteron agents can hear him.

According to text features in the comic TV Century 21 and related publications, Black was born Conrad Turner in Manchester, England (for some reason he speaks with a North American accent until his corruption at the start of "The Mysterons", he may have adopted this accent to mask his identity) and was orphaned at 7 months as a result of a brief nuclear war. He was raised by distant relatives who provided little emotional support, causing him to be cold and reclusive during his adolescence. At 15, he entered Manchester Technical Academy (a chapter of the Northern University), and graduated with diplomas in Physics, Space Navigation and International Law; he then went into the Northern University and received diplomas in Science and Technology, all this done in three years. He joined the Royal Air Force and served in the British Civil War at the age of 18. After the country was admitted to the World Government, he achieved renown for his work in the World Army and Air Force, and later as a Fireball XL3 pilot in the World Space Patrol. He was Spectrum's first agent, and oversaw the construction of Cloudbase during the 2060s.[7]

In the episode "Treble Cross", an Air Force test pilot unexpectedly survives an assassination attempt by the Mysterons and aids Spectrum in another effort to apprehend Captain Black. However, he is not deceived when the human pilot poses as his own Mysteron duplicate and evades Spectrum for a second time; Captain Blue infers that the Mysterons have equipped him with a "sixth sense" to warn him of danger. If under threat of imminent capture, Black is able to teleport away from danger – an action demonstrated in the episodes "The Heart of New York", "Model Spy" and "Inferno".

The character is seen to wear his Spectrum uniform only in the pilot episode and in the secondary opening sequence for all episodes thereafter (in which he is shown to be standing symbolically in a moonlit graveyard). On all other occasions, he is wearing civilian clothing– typically black trousers, a black zip-up jacket and an orange sweater. This is presumably so the other Spectrum personnel cannot contact him therefore making him more inconspicuous, harder to pinpoint and aid in his elusiveness. However, he is shown wearing his uniform in various comic stories where there is no immediate demand for secrecy or when his mission would benefit from it, such as when the Mysterons took control of a robot production facility or when Black tried to manipulate an amnesic Scarlet into helping in an attack on a major conference being held to justify Spectrum's funding.

There are several differences between the original Captain Black and that seen in the remake series. For example, his surname is Lefkon (as shown on his gravestone in the first episode, "Instrument of Destruction, Part 1"). The voice of the new Black is the same as before Mysteronisation, save when the Mysterons assume direct control over his body. Before Mysteronisation, he is portrayed as a sympathetic character, and his destruction of the Mysteron city is given added justification by the fact that equipment on board the MEV explicitly identifies the Mysteron probe as a weapon. By contrast, after his Mysteronisation he is an almost stereotypical villain, taking pleasure in the acts of murder that he commits; in one episode, he leaves Captain Scarlet chained up next to a doomsday device, complete with digital countdown. However, on some occasions (for example, in the episode "Best of Enemies") Scarlet is able to educe Black's original personality, nearly to the point of breaking the Mysterons' conditioning.

In "Dominion", the series finale, Black is knocked unconscious while attempting to destroy a nuclear facility. On recovering, he claims to have been liberated from Mysteron control, and asks Scarlet to return with him to Mars to launch an attack on the Mysteron city. Although the attack is successful, the Mysterons re-assert control over Black. The final image of the series is of Black watching Scarlet's departing spacecraft, then turning about and walking into the distance; two green rings envelop him, and Black vanishes.

According to promotional materials, Conrad Lefkon was born in Brooklyn, New York and was the son of a local crime lord, and joined the army to escape from the "family business". However, in the series he speaks in an English accent, the inverse of the original show.