: Filming took place in Moscow, St. Petersburg, and Kislovodsk. Episode Schedule (Season 4) Шифр (телесериал) - Википедия
This episode is the penultimate chapter of the series, focusing on the murder investigation of : : Filming took place in Moscow, St
: Police locate the car used to hit Nikitina. : Filming took place in Moscow
: Season 4 is the concluding chapter of the original project. : Filming took place in Moscow, St
: Anna and Sonya discover Polina had secret ties to the "stilyagi" (Soviet youth subculture) and had recently changed her lifestyle.