Episode 8 (S05E08)

Mikhaïl Karlov unexpectedly finds a package containing the USB drive utilized by Sylvain at his job. Concerned and puzzled, he attempts to contact the young hacker, only to discover that Sylvain is currently on a critical assignment in Seoul. At the same time, Alexis Bakatine, the FSB's security chief, intensifies his probe into the elusive spy known as "Black September," seeking to determine whether Pavel is operating as a double agent.