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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

Demonstrative adjectives can also be used as demonstrative pronouns. Daniela explains how that works, and also discusses how to use an apostrophe when the noun following the demonstrative adjective starts with a vowel.

Luca has resolved the case, and Marta arrives with Fabrizio to take over from him. But who could have predicted what happened next?

There's some tension between Dante and Eva but they get distracted by Lorenzo who shows up at the restaurant in high spirits. The chief of police, also in high spirits, stops by to report on having caught a corrupt contractor.