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The Soviet Intelligence Agency, the KGB, was both an Intelligence Agency and 'Secret Police'.
KGB
Yes. It is known as the Secret Intelligence Service (SIS) and informs the Queen of foreign intelligence. It is comparable to the US'S Central Intelligence Agency (CIA) that does the same for the President.
FSB
It used to be know as NIS the National Intelligence Agency
No, there is no British MI4. The British intelligence agency commonly known as MI6 (Secret Intelligence Service) is responsible for foreign intelligence and counterintelligence operations. There is no official mention of an MI4 in the British intelligence community.
It is the secret agency of Pakistan. ISI stands for Inter-Services Intelligence.
Canada's secret service agency is called the Canadian Security Intelligence Service (CSIS for short).
The correct name of this agency is the Central Intelligence Agency.
Fictitious secret agent James Bond works for MI6(Military Intelligence, Section 6), now known in real life as the SIS (Secret Intelligence Service). This is the agency responsible for Her Majesty's foreign intelligence.
The MI6 program does not have a specific boss. It is a British intelligence agency, also known as the Secret Intelligence Service (SIS), and its operations are overseen by a head known as the Chief of the Secret Intelligence Service.
Central Intelligence Agency (CIA) is the intelligence agency of the USA.