This article considers the relationship between intelligence and the arms trade by examining North Korea’s procurement of 86 Hughes helicopters in the 1980s. Using recently declassified documents, the article contextualises the case using US intelligence assessments of North Korea’s procurement, and considers the role of the DPRK’s diplomats in Berlin, and the Western powers’ response. This history provides insights into the use of intelligence operatives for arms procurement, the role of intelligence agencies in monitoring the illicit arms trade, and the challenges in collection, analysis and acting on the intelligence surrounding arms trafficking.