Secret service World War, 1939-1945 61 History 47 Spies 33 Intelligence service 16 Espionage 13 Intelligence officers 9 more ... Television programs 9 Foreign relations 8 Cryptography 7 Military intelligence 7 Women spies 7 Politics and government 6 World War, 1914-1918 5 Campaigns 4 Espionage, British 4 Underground movements 4 Vietnam War, 1961-1975 4 Action and adventure films 3 Espionage, German 3 Espionage, Soviet 3 Holocaust, Jewish (1939-1945) 3 Police 3 Censorship 2 Commando operations 2 Conspiracy 2 Family secrets 2 Feature films 2 Internal security 2 Mothers and daughters 2 less ...