Donald Maclean was a star diplomat, an establishment insider and a keeper of some of the West's greatest secrets. He was also a Russian spy, driven by passionately held beliefs, whose betrayal and defection to Moscow reverberated for decades. Christened ?Orphan? by his Russian recruiter, Maclean was the perfect spy and Britain?s most gifted traitor. But as he leaked huge amounts of top-secret intelligence, an international code-breaking operation...