Book excerpt: The astonishing but true story of one of the most notorious spy cases from the Cold War—and the international manhunt that seized global attention as it revealed the shadowy world of deep cover KGB operatives. The dramatic arrest in London on January 7, 1961 of five Soviet spies made headlines worldwide and had repercussions around the globe. Alerted by the CIA, Britain's security service, MI5, had discovered two British spies stealing invaluable secrets from the highly sensitive submarine research center at Portland, UK. Their controller, Gordon Lonsdale, was a Canadian who frequently visited a middle-aged couple, the Krogers, in their sleepy London suburb. But the seemingly unassuming Krogers were revealed to be deep cover American KGB spies—infamous undercover agents the FBI had been hunting for years—and they were just one part of an extensive network of Soviet operatives in the UK. In the wake of the spies' sensational trial, the FBI uncovered the true identity of the enigmatic Lonsdale—Konon Molody, a Russian who had lived in California before being recruited by the KGB. Molody opened secret talks with MI5 to betray Russia, but before he had the chance, the KGB blackmailed Britain into spy swaps for him and the Krogers. Based on revelatory, newly-released archival material and inside sources from around the world, Dead Doubles follows the hunt for the highly damaging Portland Spy Ring. As gripping as a le Carré novel, this incredible narrative, layered with false identities, deceptions, and betrayal, crisscrosses from the UK to the USSR to the US, Canada, Europe and New Zealand, and brings to life one of the most extraordinary spy stories of the Cold War.