For some 25 years the author Graham Greene found himself the victim of a bizarre masquerade. A man calling himself Graham Greene opened hotels in Jamaica, courted high society in the south of France and was entertained in India by tea planters convinced that he was the real author. The other Graham Greene has left few traces behind, letters and the occasional photo, collected over the years by Graham Greene like clues from one of his own thrillers. But is 'the other' perhaps a decoy, invented by the secretive Greene to confuse and deceive his chosen biographer Norman Sherry? On the 25th anniversary of BBC2 Greene himself joins Arena on the trail of his Doppelganger, in a search for the real Graham Greene.