Possible Clues:

• Enemy in a Le Carré novel
• Cold War agent
• Common 29 Down character
• Bond film antagonist
• Illya Kuryakin, e.g., in 'The Man From U.N.C.L.E.'
• Cold War Bond enemy
• CIA antagonist during the Cold War
• Former CIA agent counterpart
• Putin, once, maybe
• Cold war mole