In a meeting with a special services researcher, the discussion will focus on how a complex system of state protection was formed in the 20th century. The lecture will begin with an overview of the situation at the twilight of the Russian Empire, when the security department and political investigation became the state's response to the rise of revolutionary sentiments. The speaker will explain what surveillance methods were used, how informants operated, and why some practices survived the regime change. The conversation will then shift to the early post-revolutionary years when the structures of the Cheka, GPU, and NKVD were created, and the concept of "enemy of the people" became part of everyday reality. Next, the discussion will cover the Stalinist period. The lecturer will explain how security agencies turned into instruments of mass repression, why fear and total control became the backbone of the system, and how this affected the fates of the leaders of the agencies themselves. Through specific stories, it will become clear that employees of the security forces themselves often found themselves hostages to political decisions and inter-agency games. The post-war decades and the late Soviet period will also be addressed. Participants will learn how special services interacted with dissidents, the intelligentsia, and youth movements, and how priorities shifted from internal control to external intelligence. The topic of technological progress in special services will also be touched upon: ciphers, wiretapping, archives, and closed files. The final part of the conversation will be dedicated to how the state security system transformed at the end of the 20th century and why the legacy of past decades still influences public discussions and popular perceptions of spies and counterintelligence.