After the discovery of Andrea Greco's body, suspicions about who the serial killer might be focus on Roberto, Barbara's ex-husband. Rostagno is initially incredulous, but little by little she realizes that the hypothesis is far from unfounded. Luca is convinced that Remo's testimony can finally exonerate Giulia, but it is still too early to claim victory. Viola is still in Balsamo's hands and Remo is willing to risk his life to save her.