Dalby, Jean and the protagonist are sent to the test site as British observers, and while there the protagonist learns from an old friend, Barney, that the Americans suspect him of being a double-agent due to the deaths of the US operatives in Beirut. Jean reveals to the protagonist that Dalby has been visiting an abandoned Japanese bunker on the island. Soon after, Barney is killed in apparently suspicious circumstances, and while following Dalby to the scene the protagonist is present when the bomb test site is sabotaged, setting back the bomb test and killing a military police officer. The protagonist is arrested by the Americans and interrogated, before apparently being transferred to Hungary on suspicion of being a Soviet agent. There, he is drugged and subject to days of psychological and physical torture, and nearly cracks before eventually managing to escape—only to discover that he is in fact in London. The protagonist takes refuge with Charlie Cavendish, the father of a friend killed towards the end of the Second World War, and attempts to reestablish contact with WOOC(P) without being arrested for treason. Charlie is killed by Jay's operatives, forcing the protagonist on the run; he approaches Dalby at his home, but discovers Dalby meeting with Murray, Jay and another of Jay's operatives—confirming the protagonist's suspicions that Dalby is in fact the traitor.