A NINE-LETTER WORD BEGINNING WITH C...
CYBERNAUT... the most efficient of killers, the brainchild of electronics genius Clement Armstrong (Michael Gough) and defeated (so it seemed at the time) by John Steed and Emma Peel. But the Cybernauts would be back... resurrected by suave but diabolical Paul Beresford (Peter Cushing) and, finally, by double agent Felix Kane (Robert Lang) to exact revenge on Steed and his new companions, Purdey and Gambit.
