: The police exhume the body of an Alsatian dog that died shortly after being vaccinated.
While looking for clues in Volynin's hospital room, discovers scratches on the balcony door that match those found on his front door. The team initially suspected a dog, but a neighbor reveals that Volynin had sought help from a local "sorcerer" named Shefner to quit drinking, who instructed him to draw these specific symbols.
: The series continues to capture the atmosphere of 1950s Moscow, focusing on the unique analytical talents of the former GRU codebreakers.
You can find more detailed episode guides and reviews on platforms like Vokrug TV or Kino-Teatr .
: This season takes place without Sergei Puskepalis (Proskurin), whose character has been written out as having moved to another city, though he remains mentioned in the plot.
: Anna is pregnant by Letnev but chooses to keep it a secret from him, adding personal tension to her high-stakes investigative work. Cast and Production
Сериал Шифр-4 (2023-2024) - содержание серий
: The investigators learn about a second dog Volynin owned, for whose death he blamed a local veterinarian.