Alba spills her story to the girls. Naturally, they want to help her. Eva has a letter from Dante she is afraid to open.

Guia has a flash during the fashion show she and Carola attend. Pino puts on a great show for his friends from town.

We see the difference between Luca's by the seat of his pants investigative technique and Lara's more scientific technique. They both have their place, but in this case, Luca's is more effective. The team makes some headway, even if it is just to eliminate some suspected murder weapons.

Some idiomatic expressions need some explanation and Marika is here to do just that, this time using examples from the popular TV series, Commissario Manara. You'll be speaking Italian like a native in no time.

There are a lot of interesting places to see from the walls, as Arianna rides around on her rental bike: the botanical garden, a tower with trees on it, and the entrance to a pilgrimage route to Rome.

The final segment of this tour of Umbria and Tuscany brings to the walls of Pisa and its famous schools of higher learning. As usual, Alberto Angela gives us some insight into how and why things happened as they did, as Pisa developed into one of the most beautiful and important cities in Italy.

Ugo seems to have a mysterious mission. Nora sees to Matì, whose dress is done and gorgeous. Ugo takes Francesco to choose an engagement ring.

It looks like Lorenzo is interested in someone new. At the restaurant, Lola tells her friends why she is excited. There's some unpleasantness regarding the couple having lunch.

Mara is bummed out, for sure. Felice too! Delfo, on the other hand, shows a side of himself no one has seen before.

Ada and Pio go dancing, but when they get back to her place, they get an unexpected interruption. A bit later, Ada innocently reveals some new elements to the case, and Luca comes back to life from his doldrums.

In English, the difference between "until" and "as long as" is quite distinct, but in Italian, it's a little blurry because the presence of the negative word non (not) might change the meaning of a phrase or it might not. When the meaning is not altered by its presence, the word, in this case non (not), is "pleonastic." We're talking about finché and finche non.

This single, Vento sulla Luna (Wind on the Moon) provides plenty of expressions and modi di dire (ways of saying things) to boost your vocabulary. It was written and is performed by Italian singer-songwriter Annalisa in collaboration with Rkomi.

The fresco depicting the Last Judgement is almost like a photograph of the Middle Ages. Alberto Angela shows us where the sinners ended up and what happened to them in Hell.

They go to dinner with Francesco and Matì and gently encourage the couple to think hard about what they want. It's natural for memories to come bubbling up from when they were courting.

The best way to get around Lucca is by bike. Arianna rents one and enjoys riding along the amazing walls of the city, still intact after centuries.