Рёрёс„сђ 4 Сѓрµр·рѕрѕ 15 Сѓрµсђрёсџ (2022) Apr 2026

This episode is the penultimate chapter of the series, focusing on the murder investigation of :

: The season was filmed without the lead actor following his tragic death in 2022. His character, Proskurin, remains "behind the scenes" to maintain the story's continuity. This episode is the penultimate chapter of the

: Police locate the car used to hit Nikitina. : Katerina discovers a broken female fingernail with

: Katerina discovers a broken female fingernail with bright polish on the back seat, leading to suspicions that a woman was behind the wheel. : Filming took place in Moscow, St

: Season 4 is the concluding chapter of the original project.

: Anna and Sonya discover Polina had secret ties to the "stilyagi" (Soviet youth subculture) and had recently changed her lifestyle.

: Filming took place in Moscow, St. Petersburg, and Kislovodsk. Episode Schedule (Season 4) Шифр (телесериал) - Википедия