Imma is having a relaxing moment at home, lost in thought, when the doorbell rings, and she gets curious. Valentina is at a cooking demonstration.

Armando tells us how the designs he is fascinated by come to be. It all has to do with billboards, and how they are marked up, torn, and over time, oxidized. The oxidation process is fascinating.

We get a glimpse of the spaces where a show takes shape, from sewing the costumes, to creating the sets and backdrops. When a model of a set arrives, the job of the team is to translate it into reality, into something big.

Livietta tells Camilla about the scene where Giulio used a word he shouldn't have and was scolded by Renzo. Camilla is still seeing the mouse. The coroner reconstructs the murder for Berardi.

Zia Clo contributes her wisdom about love as this romantic comedy comes to an end.

Alex and Lojacono go to see Biagio's friend and colleague, Renato, and Renato's father, who had been Biagio's professor. Palma talks to his superiors, who want to get involved in the case to speed things along.

Imma tells Maddalena how she thinks things went and Donata opens up. But Imma still has questions about the case.

Little by little, we discover Armando's fascination with oxidation. It seems to have started by looking at advertising billboards.

Caravaggio is in a bad way, and the fishermen agree on how to handle him. The Marquise is desperately trying to reach Porto Ercole to meet him.

Professor Capuana is one of the judges of the lasagna contest. He notices right away that two of the dishes look an awful lot alike. Later on, at the park, the JAMS have an uncomfortable discussion.

Tortona is an area of Milan, where steel mills stood previously. The huge structure turned out to be perfect for housing, once renovated, the Ansaldo workshop for the sets of Teatro alla Scala. The area has become very trendy and popular, especially during the Milan Fashion Week.

Camilla is still upset about what she thinks she saw during the night and goes to see Gaetano. Renzo goes to pick up Livietta at dance and can't help conjuring up the memory of the merengue teacher he had been attracted to.

Nora and Roberto arrive at the top of the mountain where the wedding is to take place. The family has gone up there by car. Nora's dress is ready in the lodge. Meanwhile, Ugo tries to climb up the rock face, with the help of Spartacus, who is supposedly an expert.

Alex's father isn't happy, but she manages to go out for the evening, to have pizza with Rosaria. Francesco is home watching TV, and doesn't seem happy.

Calogiuri has an intimate moment with Maddalena and attempts to get some truthful answers from her.