Mauro tells Giulia that he suspects there is a mole among the Carabinieri, but the commissioner thinks he is too involved and passes the investigation to Luca and Anna. Agent Gori collaborates with Captain Rea in the search for the CD-ROM that Liverani wanted to give to Germana, but nothing happens at the villa. Roberto and Mauro instead deal with the case of a newborn baby kidnapped from a clinic: they will discover that it was the very young natural mother, the Albanian Irma, who took him back. In fact, the baby was sold to a wealthy childless couple. Daniele, Sabina's brilliant computer scientist partner, is involved by Mauro in the investigation into the ecomafia: his help is needed to decrypt Liverani's CD-ROM. Giulia decides to cover for her men, unleashing the ire of prosecutor Altieri who had assigned the investigation to the Carabinieri. Davide is also hurt by Giulia's choice but she explains her doubts to him.