"Mitchell, Graham"@en . . "British MI5 officer" . "Graham Russell Mitchell OBE, CB (1905 \u2013 1984), was the deputy director general of MI5, the British Security Service, between 1956 and 1963. In 1963 Roger Hollis, the MI5 director general, authorised the secret investigation of Mitchell following suspicions within the Secret Intelligence Service MI6 that he was a Soviet agent. It is now thought unlikely that he ever was a \"mole\"."@en . . "1984Z"^^ . . . "Mitchell, Graham Russell (full name)"@en . "Graham Mitchell"@en . "1905Z"^^ . "Graham Russell Mitchell"@en . "Graham Russell Mitchell"@en . "1984-11-19Z"^^ . "1905-11-04Z"^^ .