Oleg tells the investigators of a mission for Line X. This is the section within a Soviet embassy that focused on espionage in scientific areas. This is one of six "lines" or sub-departments. These include:
- Line PR - collects information about political, economic, and military strategic intelligence, also active measures
- Line KR - counterintelligence and security
- Line X - scientific and technical intelligence, specifically, acquisition of Western technology
- Line N - support to illegals
- Line EM - intelligence on emigres
- Line SK - security and surveillance of the Soviet diplomatic community