On this episode, FBI agent Eric O'Neill goes undercover to catch a suspected spy in the bureau: Robert Hanssen. O'Neill is just 26 at the time. Hanssen turns out to be one of the most damaging spies in U.S. history.This is part one of a two-part story.If you haven't signed up for our newsletter yet, go to https://foreignpolicy.com/ispynewsletter/.Each week we'll send you bonus content you won't find anywhere else, including photos, illustrations, and expanded show notes—for free.Hosted on Acast. See acast.com/privacy for more information.Learn more about your ad choices. Visit megaphone.fm/adchoices