The article presents key points on the use of the polygraph in criminal intelligence and surveillance operations of internal affairs bodies. In a visual, concise, and accessible format typical of a guide, the following issues are addressed: the concept of the polygraph; areas of polygraph application in internal affairs bodies; recommendations for operational officers on interaction with polygraph examiners in their area of operational responsibility; risks associated with the use of the polygraph during specific criminal intelligence and surveillance operations and possible ways to mitigate these risks; directions for improving the effectiveness of polygraph use in criminal intelligence and surveillance operations; methods for scaling the psychophysiological lie detection method for the purposes of criminal intelligence and surveillance operations; principles of polygraph use in criminal intelligence and surveillance operations; and elements of the polygraph application system within internal affairs bodies. The research is addressed primarily to law enforcement officers whose functional duties include detecting and solving crimes, as well as to interested students, lecturers, and research scientists.