Margherita Hack spent some time in politics and was also an entrepreneur at times. But she had a lot of fun, too. On the panel with Camilleri, the author of the Montalbano stories, they all come out (in unison) with the famous introduction Montalbano sono (Montalbano, I am). Putting the verb at the end is typical of Sicily, where the story takes place. Otherwise, it would be Sono Montalbano (I'm Montalbano) or, on the phone, "This is Montalbano."

Michele goes back home after his mother dies and there, he spends some time with his childhood friend, Costanza Colonna. He tells her about his plans to go to Rome, the artistic center of the universe.

In the piazza, Giuseppe discusses the war with some colleagues. He then runs into an old acquaintance. Later, in the lab, he talks about science and faith with his professor friend.

We discover that Margherita Hack was a devoted fan of the long-running TV series, Un posto al sole [a place in the sun]. She explains why. Francesca goes back to Trieste and meets up with Eda who talks about having lived in the same house with Margherita Hack.

Once in Rome, Caravaggio looks for work in the studios of 2 Italian painters who were well-known at the time. Nobody seems very interested in his work.

When Moscati arrives home, he has a huge surprise waiting for him: an endless stream of poor people. At the hospital, Sister Helga catches Arcangelo with a nurse and is furious.

In this segment, Margherita talks about her choice not to have children and also discusses her position regarding God. She can't prove he exists nor can she prove he doesn't.

Caravaggio falls ill and makes the acquaintance of Mario Minniti who becomes a friend to him. He takes him to the hospital of the church of Santa Maria della Consolazione in Rome.

Arcangelo and Sister Helga don't like each other much, but they have to work together to save the patient. At home, at lunch, Giuseppe has a strange feeling and rushes off.

Even though Aldo and Margherita were very different in many ways, they came together in their skepticism. Towards the end of her life, Margherita couldn't move around much, but her brain never stopped going.

Caravaggio meets Onorio Longhi, Italian architect and poet, and a bit of a bohemian. Longhi takes him to meet his friend Cesare D'Arpino, who is looking for assistants in his workshop.

Giuseppe's colleagues want to get Giuseppe away from the hospital because he makes too much "trouble." Giorgio has a suggestion for that.

Margherita left a legacy of progress, both scientific and social. Perhaps she is still looking down on us, since an asteroid was named after her: 8558 Hack.

After a night of drinking and brawling, Michele is finishing a painting outside the workshop. Baron Cenci shows up and likes what he sees on the easel. The Baron's daughter is in the carriage and exchanges a few words with Michele.

Elena explains her health problem to Giuseppe and they also clarify some personal things. Giuseppe then takes her to a special place in the city.