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

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.

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

In this song, a child is very proud of his father whose job it is, out of choice, to do all the housework. There's some great vocabulary for beginners.

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.

Italians have a reputation for stressing out about catching a cold or a chill. Thus parents will oblige their kids to wear an undershirt when they go out, like it or not.

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."

Luca gathers some more information about the case when he goes to see Laura's mother. Toscani and Marta go to the place where the DVD was thrown away.

Antonino has a visitor from Sorrento on the Amalfi Coast, who brings in some of the world-famous Sorrento lemons. They prepare whole-wheat spaghetti with a simple sauce featuring lemon rind and bottarga (salted fish roe).

We visit the land of the trulli, curious dry stone huts. Alberto Angela gives us some background about these unique dwellings.

Marino meets Silvana and they start chatting by the sea. They discover that their professions are related (naturopathy and body-psychotherapy) and they enjoy sharing ways of looking at emotions and symbols.

Adriano's new idea is to open a factory in the south of Italy, a very poor part of Italy. Convincing his board is a huge challenge. He takes Karen and her camera around the southern part of the country to scout for locations.