: Elena Panova (Katerina), Ekaterina Vilkova (Anna), Maryana Spivak (Irina), and Yana Dyubui (Sofya).
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. : Elena Panova (Katerina), Ekaterina Vilkova (Anna), Maryana
: 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 : Elena Panova (Katerina)
: The investigators learn about a second dog Volynin owned, for whose death he blamed a local veterinarian. Ekaterina Vilkova (Anna)