John Vassall

KGB defector

KGB officer

American intelligence officer; Chief of the CIA's counterintelligence staff from 1954 to 1975

Scottish politician

CIA officer

Soviet spy

KGB officer

Director General of MI5

British politician

British intelligence officer and a spy for the Soviet Union

Former colonel of the KGB

Russian dramatist

British intelligence officer and spy for the Soviet Union

British-born radio producer, intelligence and Foreign Office officer and double agent

British writer and economist

British journalist and writer

British activist

KGB officer

British diplomat

British spy in the USSR

American spy

American journalist

English scientist and former MI5 intelligence officer

British novelist

English espionage historian, novelist

American spy for the Soviet Union

Soviet spy

British spy

British politician

British diplomat

Austrian scientist

British diplomat and spy

British journalist and author in the Soviet Union

American spy for the Soviet Union

American officer

English barrister, politician and author

KGB officer

Soviet spy and GCHQ employee

British and Australian intelligence officer

Russian writer

British spy, a double agent in the service of the Soviet Union

United States Marine

South African Navy commander and soviet spy

British MI5 and SIS officer

American economist

Soviet spy

Alexander Feklisov

British counter-intelligence official

American spy for the Soviet Union

Cipher clerk, Soviet defector

American spy

Polish spy

British diplomat who spied for Poland

British spy

Canadian diplomat

Russian activist and KGB general

Central Intelligence Agency counter-intelligence officer and analyst

British novelist

MI5 officer and art dealer

British journalist and spy

American magazine publisher, novelist, patron of the arts

American economist and politician