On 23 January 1963 Kim Philby fled to Russia. It was the end of the career of the most dangerous spy ever to penetrate British intelligence - for Philby had, during most of the preceding 25 years, occupied senior posts in the British Secret Service. Tonight's film examines the Philby story from his childhood, through his recruitment to the Communist cause as a Cambridge undergraduate, to his final defection - and includes unique film material by Philby's son showing his father's present life in Moscow. With contributions from John Philby, Hugh Trevor-Roper, Miles Copeland
Commentary spoken by Rene Cutforth
An Interservice - TVR Production for BBC Television
('Philby was a damned Communist, but you have to admit he was a genius': page 9)