At school, Alex and Aiello are arguing because Aiello wants Alex to delete some photos from his phone, but Alex doesn't want to. With Camilla's arrival in class, the argument calms down, but the teacher would like to know why Aiello got so upset.

Maestro Marioni asks Matteo what he wants to do with his life in music and is not satisfied with the answer he receives. almost yelling, Marioni urges Matteo to do more than merely give it a try.

While the investigations continue, Renzo has an unpleasant surprise that undermines his peace of mind as a husband, and even a competition he must participate in doesn't give him peace.

Outside school, Sara meets up with Gigi her boyfriend. She has taken Matteo with her to have some company, since the discussion isn't going to be pleasant. As they go back into the building, Maestro Marioni appears, looking for Matteo.

Alex has a conversation with her father, who hopes for a future for his daughter that will never actually happen. Meanwhile, Pisanelli is increasingly determined to catch the serial killer.

Berardi is gathering information about the victim. Ferrari identified a report about a missing American girl and Berardi goes to see her sister, who reported it. Meanwhile, Camilla's house has gotten flooded and Renzo is very angry.

A chaotic day in Italian class: Amid grammatical difficulties, unexpected incidents, and group dynamics, tensions, irony, and solidarity intertwine among students and teachers.

Aragona and Romano go around with the photo they had found, asking questions of guys who might recognize him. At one point, a young man comes out of the bar and starts running, pursued by Aragona.

Gaetano receives a phone call and when it ends, he finds himself obliged to tell Camilla that it was from a journalist he had met in Prague. Back at school, Camilla wants to know more about the centurion, while Renzo is dealing with a problem at his studio.

Lojacono and Di Nardo go to speak with Don Michele again, when Mass is over. The priest confirms that he and Angela cared for each other very much but that they didn't have a relationship. He is being rather defensive, but Lojacono gets him to agree to cooperate.

After two years, Camilla and Gaetano meet up again at the scene where a woman had been found dead. They fall into their usual habit of discussing the crime, as if not a day had passed.

A parishioner shows up at police headquarters with photos she thinks are compromising. Lojacono and Alex then go to question the volunteers as to whether the insinuations could carry any weight.

Berardi is back in the Rome office and there's a celebration. But since there's also a dead person at the Colosseum, the celebration comes to an abrupt end and Berardi and Torre rush to the scene of the crime. The class trip also comes to an abrupt end.

Lojacono surprises Laura at dinnertime. Di Nardo has dinner with Rosaria, who has an invitation for her. At the dinner table, Giorgia has something to discuss with Francesco.

Camilla and her class are on a field trip to the theater and she is trying to hand out the tickets, but lots is happening outside, involving the other teacher, an out-of-work actor, the students, some picture-taking, and some trouble down the street.