General Karandyshev retires, leading to Colonel Postysheva taking his place. Unexpectedly, Balabin's colleague Gribanov takes over Postysheva's former position instead of Sanya.
In this season, Sanya Balabin finally receives the rank of , but his professional success often comes at the cost of his family life. The season's primary arc involves a cold-blooded killer who remains one step ahead of the police, alongside several standalone cases. Key story arcs include:
Balabin travels to Gelendzhik to dismantle a drug trafficking gang, hunts down "black realtors" (predatory property scammers), and works to identify a "mole" (traitor) within his own department. Cast & Production Sanya Balabin: Konstantin Yushkevich Nikolai Gribanov: Vadim Andreyev Varvara Postysheva: Inga Strelkova-Oboldina Vasily "Kuznechik" Kuznetsov: Ilya Shlyaga Lena Balabina: Irina Nizina Masha Balabina: Mariya Pirogova
One of the season's major cases involves an IT specialist named Pyotr who seeks justice after his former friend steals the rights to his computer game.