Alberto Angela brings medieval Siena to life, with the help of some breathtaking aerial shots.

Karen's report to her superiors about Olivetti's plans prompts some serious spying on his operation by the U.S. Mario Tchou explains his ideas to the new team of young engineers.

A big TV station comes to town and Peppino is interviewed about his missing friend. Martino has managed to set up a TV in the abandoned house he's living in, so he gets to see what his friend said about him.

Negri isn't happy to find out his money is gone, and blames it on his usual cleaners when they show up at the studio, late for work. Eva and her friends have a nice surprise for Filippo and his father, who is incredulous.

Barbagallo and Buttafuoco find the DVD at the dump, but it doesn't show the clear evidence they were hoping for. Manara is working in the shadows, however, and comes up with something. He calls on Marta for help.

Daniela explains how to use the demonstrative adjectives questo and quello [this and that]. She also tells us about a third demonstrative adjective that, these days, is used only in Tuscany: codesto.

We are now in the heart of Italy: Tuscany. One of the most beautiful and important cities in Tuscany is Siena with its very particular piazza.

After Philip's baptism, there is a banquet with typical Sicilian food, and favors for the guests. And there also happens to be a stunning view of Palermo from the convent or monastery hosting the party.

Adriano's son Roberto has an idea he wants to develop, but Adriano is skeptical, at least at first. But Roberto knows how to tempt his father with good cocoa and this leads to an important meeting. While they are out, they discover that Mauro Barale is running for office.

Eva's expertise shines through as the situation at Negri's studio takes an unexpected turn. Lola also plays an essential role in the success of the heist.

Manara may have been suspended, but that's not keeping him from working on the case in his way. Buttafuoco and Barbagallo go to the dump to find the DVD.

Alberto Angelo tells us the fascinating story of how trulli are built. Some of the most characteristic trulli can be found in Alberobello.

Arianna explains what a casbah is, and she and Simone take us around to the Tunisian consulate and the old washhouse.

Adriano imagines his new factory and describes the layout to Karen. The workers in Dalmasso's factory are not happy about their working conditions and Mauro manages to placate them. Dalmasso notices his skill in dealing with people and has a new idea of a job for him.

It's time for the girls to act. They carry out their various tasks and manage to get into Negri's studio. Eva makes a beeline for the safe. Eva is disguised, and is described by her friend as the Befana. Befana is a corruption of Epifania (Epiphany) and, in Italian tradition, the Befana is an old woman who brings gifts (or coal) for children on this holiday. Befana has also come to mean "witch."