Between late 1979 and early 1981, a group of American diplomats was held hostage in Tehran by Iranian radicals, triggering a tense international crisis. Efforts to rescue the hostages, including a covert airborne operation authorized by then-President Jimmy Carter, ended in failure, weakening U.S. standing and drawing sharp criticism from various quarters. Among those calling for a more aggressive response was Donald Trump, who in October 1980 expressed disappointment that a military invasion had not been launched.

Following the hostages’ release, which occurred shortly after Ronald Reagan assumed the presidency, the focus of U.S. and British intelligence shifted away from Iran amid other pressing global events such as the Cold War and the Falklands conflict. Despite the dearth of official diplomatic presence in Tehran, both nations maintained limited covert operations. The British secret intelligence service, MI6, operated with only one agent on the ground, Ian McCredie, who was posted under the cover of a trade official. McCredie, newly married and recently trained in espionage techniques, was fluent in Persian and adept in clandestine methods, including the use of invisible ink.

Within Tehran’s sphere of Soviet intelligence, Vladimir Kuzichkin, a KGB officer, found himself increasingly disillusioned by internal corruption, favoritism, and widespread alcoholism. Kuzichkin’s deteriorating health, exacerbated by stress and resulting in erectile dysfunction, propelled him to reach out to McCredie and offer to defect. Despite its lack of effective medical remedies—both in the Soviet Union and the West—MI6 arranged for Kuzichkin to receive placebo treatment, which reportedly improved his psychological state and facilitated ongoing cooperation.

The relationship between McCredie and Kuzichkin, codenamed “Redwood,” evolved as MI6 guided him to relay sensitive intelligence. Initially planning to extract Kuzichkin after a year to maximize the value of the information he could provide, the British operatives became increasingly concerned for his safety as suspicions grew among both the KGB and Iranian counterintelligence. Kuzichkin’s personal life also suffered under the strain, with his marriage deteriorating. Ultimately, McCredie orchestrated a risky escape plan across the remote border into Turkey.

After being given a new identity, Kuzichkin resettled in a coastal town in England, where he established a career as an acupuncturist. He later authored memoirs detailing his espionage experience, published in 1990 with an introduction by novelist Frederick Forsyth. This case, chronicled in a recent work by Ben Macintyre, highlights the complex human dimensions underlying intelligence operations, focusing on the lives of McCredie, Kuzichkin, and their families. Their roles, though low in the hierarchy of their respective organizations, had significant ramifications amid the broader geopolitical tensions of the era. The story has been praised for its meticulous research and compelling narrative, blurring the line between fact and spy fiction, and it is anticipated to inspire future film adaptations.