This season focuses on how the women adapt following the departure of Lieutenant Colonel Proskuira (played by the late Sergei Puskepalis).
Sonya infiltrates Shefner’s apartment looking for a connection to the victim. She discovers missing military books from Volynin's home and a note in Shefner’s diary confirming a meeting with him on the day he died.
She faces domestic pressure from Georgy’s mother, who is actively trying to force her to leave their shared apartment and divorce her husband. This season focuses on how the women adapt
The episode revolves around the mysterious disappearance of a body and the meticulous gathering of evidence by the former GRU codebreakers.
Just as Petr Natanovich joins the investigation, Volynin's body disappears from the morgue. While this causes panic for Korzun, Katerina views it as proof that the death was a calculated murder rather than an accident. She faces domestic pressure from Georgy’s mother, who
The tension peaks when Shefner catches Sonya searching through his personal belongings. Character Arcs in Season 4
The season follows the series' established structure, where every four episodes typically cover one major criminal case. Шифр (телесериал) - Википедия While this causes panic for Korzun, Katerina views
She struggles with a secret pregnancy by Letnev, which she hides from her peers.