Louis de Wohl worked as an astrologer for the British intelligence agency MI5, after it was claimed that Hitler used astrology to time his actions.

In February 2012 an MI5 file on Chaplin was opened to the public which revealed that the FBI had contacted the British secret service to provide them with information which would enable them to ban Chaplin from the US.

Before he can sell the secret of the atomic bomb to the Soviet Union, he is discovered by the British and is killed by members of MI5 who stage his death as a heart attack.

British examples are At Risk ( 2004 ), Secret Asset ( 2006 ), Illegal Action ( 2007 ), and Dead Line ( 2008 ), by Dame Stella Rimington ( formerly the Director General of MI5 from 1992 to 1996 ) and The Code Snatch ( 2001 ) by Alan Stripp, formerly a cryptographer at Bletchley Park.

The Double-Cross System, or XX System, was a World War II anti-espionage and deception operation of the British military intelligence arm, MI5.

The drama detailed previously unseen evidence that rogue elements of MI5 and the British military plotted to take down the Labour Government, believing Wilson to be a Soviet spy.

* Penetration of British intelligence ( MI6 ) and counter-intelligence ( MI5 ) services.

Beginning with the capture of an agent named Owens, codenamed Snow, MI5 began to offer enemy agents the chance to avoid prosecution ( and thus the possibility of the death penalty ) if they would work as British double-agents.

In July 2006, Norman Baker MP accused the British Government of " hoarding information about people who pose no danger to this country ", after it emerged that MI5 holds secret files on 272, 000 individuals — equivalent to one in 160 adults.

* The Firm, a nickname for the British MI5 Security Service

In November 1945, Trevor-Roper was ordered by Dick White, then head of counter-intelligence in the British sector of Berlin ( and later head of MI5 and MI6 in succession ) to investigate the circumstances of Adolf Hitler's death and to rebut the propaganda of the Soviet government that Hitler was alive and living somewhere in the West.

In 1932 the British counterintelligence service, MI5, began a file on MacColl, after the local police told them that the singer was " a communist with very extreme views " who needed " special attention ".

In 1935, two years after Adolf Hitler came to power in Germany, Iona von Ustinov began working for the British intelligence service MI5 and became a British citizen, thus avoiding internment during the war.

Four of the British casualties were military intelligence officers and another four were Secret Service or MI5 agents.

On 19 August 1998, Archbishop Desmond Tutu, chairman of South Africa's Truth and Reconciliation Commission ( TRC ), stated that recently uncovered letters had implicated the British MI5, the American CIA, and then South African intelligence services in the crash.

In the British service, the cases of the Cambridge Five, and the later suspicions about MI5 chief Sir Roger Hollis caused great internal dissension.

In the US service, there was also significant disruption over the contradictory accusations about moles from defectors Anatoliy Golitsyn and Yuri Nosenko, and their respective supporters in CIA and the British Security Service ( MI5 ).

Beginning in this period, the British secret service MI5 kept Bronowski under surveillance believing he was a security risk, which is thought to have restricted his access to senior posts in the UK.

* Roger Hollis, British director of MI5

** Guy Burgess, British agent working for the Soviets ; Worked for MI5 and gave information to the KGB, later defected.

: Formerly a Captain of the British Special Air Service, Ian subsequently joined MI5.

During World War II, Hart worked with MI5, a division of British military intelligence, where he renewed Oxford friendships including working with the philosophers Gilbert Ryle and Stuart Hampshire.

In that year Turnbull defended Peter Wright, a former MI5 agent, who authored the book Spycatcher, who successfully blocked the British Government's attempts to suppress the book's publication, and Turnbull later wrote a book on the trial.

At the same time, Cockburn claimed that MI5 was spying on him because of The Week, but the British historian D. C. Watt argued that it was more likely that if anyone was spying on Cockburn, it was the Special Branch of Scotland Yard who were less experienced in this work than MI5.

* History: Cases from The National Archives-Eddie Chapman ( Agent ZIGZAG ) – Security Service MI5

ASIO is comparable with the United Kingdom Security Service ( MI5 ) and the United States ' Federal Bureau of Investigation ( FBI ).

** UK: Security Service ( MI5 )

The Security Service, commonly known as MI5 ( Military Intelligence, Section 5 ), is the United Kingdom's internal counter-intelligence and security agency and is part of its core intelligence machinery alongside the Secret Intelligence Service ( SIS or MI6 ) focused on foreign threats, Government Communications Headquarters ( GCHQ ) and Defence Intelligence ( DI ).

However, as an acknowledgment of popular thought, " MI5 " is used as a sub-title on the various pages of the official Security Service website ( see links, below ).

de: Security Service ( MI5 )

The remit of the department also includes policing and matters of national security, as the Security Service, MI5, is directly accountable to the Home Secretary.

It operates under the formal direction of the Joint Intelligence Committee ( JIC ) alongside the internal Security Service ( MI5 ), the Government Communications Headquarters ( GCHQ ) and the Defence Intelligence ( DI ).

* MI5, also called the Security Service, the United Kingdom's counter-intelligence and security agency

During the war, the offices were renamed: the Home Section became MI5 or Security Service, while Smith-Cumming's Foreign Section became MI6 or the Secret Intelligence Service.

As such it is responsible for the police, UK Border Agency, and the Security Service ( MI5 ).

The United Kingdom has the separate Security Service, also known as MI5, which does not have direct police powers but works closely with law enforcement called the Special Branch that can carry out arrests, do searches with a warrant, etc.

In the United Kingdom, there is a distinction between the Security Service ( MI5 ) and the Special Branch of the Metropolitan police (" Scotland Yard ").

CSIS, like counterparts such as the United Kingdom Security Service ( MI5 ) and the United States Central Intelligence Agency ( CIA ), is a civilian agency.

In August 1942, Déricourt deceived local MI9 agents ( Escape Service ) in Marseilles and got transport to Britain where he was investigated by MI5 ( Security Service ) who expressed concerns about him.

In October 2001 he won a test case in the High Court, when the National Security Appeals panel ruled that the Data Protection Act required the Security Service MI5 to allow him access to information which he believed the security service holds on him, the first time this had happened in the 92-year history of MI5.

Reportedly, Zatuliveter had been identified by MI5 ( UK Security Service ) when surveillance linked her to another person with close links to the Russian embassy in London ; the latter was suspected of working for the SVR, Russia's foreign intelligence service.

David Shayler ( born 24 December 1965 ) is a British journalist and former MI5 ( Security Service ) officer.

The founding non-executive chairman, responsible for the overall approach of the Agency, was Sir Stephen Lander, former Director General of the Security Service ( MI5 ).

It can call on resources from other government departments and agencies, including MI5, the Communications-Electronics Security Group and other Government departments responsible for national infrastructure sectors.