Sezon 4

In the trial against the Casalesi clan boss, the Bologna prosecutor's office must rely on the testimony of Jelena, who is now under protection. Coliandro, still in love with the woman, learns of her new cover and decides to visit her. There, however, he must contend with two seasoned killers.

As punishment, Coliandro has been transferred again, this time to the tedious canine unit. His sister comes to visit him, deeply concerned about her daughter Angelica, who is dating a boy associated with a satanic cult.