The endings are very different. In the novel, Kendig fakes his own death using a body recovered from a Paris street and includes all copies of his manuscript, ensuring it will never be published. In the film, his escape airplane explodes in mid-air just as it heads over the English Channel and no body is recovered. His exposé is published and is a great success. Both works include a knowing nod from Cutter indicating that he is sure that Kendig is alive but hopes that he will stay dead. The character of Isobel, Kendig's old flame, provides a romantic interest in the film. In the novel, his feelings for a hired pilot, prove to him that he will find a new life outside the world of spycraft.