Captain Black is the fictional nemesis of Captain Scarlet and the primary recurring Mysteron intermediary in the 1960s British Supermarionation science-fiction television series Captain Scarlet and the Mysterons and its 2005 computer-animated remake, Gerry Anderson's New Captain Scarlet. "Captain Black" is a codename; his birth name is not revealed in the original series, although tie-in media have given it as Conrad Turner (original series), in the remake series Blacks's tombstone clearly reveals his name as Conrad Lefkon (S01E01, 13m28). His transformation from human to Mysteron agent occurs on Mars in the first episodes of both the original and new series, "The Mysterons" and "Instrument of Destruction, Part 1".