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.

Sally shows up at Martino's hideout and wants to know why he is faking his "disappearance." They share some food and some thoughts.

Adriano goes to Rome to try and get financing for his project. He is unpleasantly surprised to have to deal with someone he knows very well and with whom he had had a falling out.

This song, written by Ivano Fossati and sung by Loredana Bertè with her scratchy voice, has never lost its popularity with Italians.

Andromeda tells us about rescuing an old dog who was destined for the dog pound. Now he's a member of the family, but it wasn't easy.

The Siena Cathedral is one of the most notable examples of Italian Romanesque-Gothic cathedrals, and is well worth a visit, for both the beauty of the exterior and the unique marble artwork on the interior.