We look at the preposition in [in, to, at] and how it combines with the various definite articles.

Ugo is busy, so Nora gets Roberto to help out with some venue scouting for the wedding. Maya reveals her true origins, which is a bit of a shock to Lorenzo.

Dafne and Luigi are dealing with the aftermath of Dafne's mother's death. Meanwhile, Dafne's uncle and aunt arrive.

Nature offers us some extraordinary wonders, and this time, Alberto Angela takes us to the Frassassi Caves, in the Marches region, and explains what the caves were used for by prehistoric man.

Raffaella tells some anecdotes about some big stars she had encountered during her career. She also gives us some details about a famous "telephone number" song, and the famous dance number, "Tuca tuca" that created a bit of scandal in the early seventies.

Calogiuri and Imma go to the site, where they are making a movie, to see if there is anything to be learned. Calogiuri gets noticed by the director because of his good looks. Could he make it as actor?

In the Martini household, the news leaks that Mariano will be coming to stay — another headache for Grandpa Libero, who wonders, "How did this happen?" As you watch, be on the lookout for the saying: campa cavallo. Marika explains this expression in a video lesson.

Gaetano and Camilla do a post mortem at his apartment. He stocked up on vermouth, just for her.

Marika concentrates on the preposition su [on] in combination with various articles to form the very useful sul, sui, sugli, sulla, sulle and sull'.

Both Lorenzo and Ugo are trying to show their partners that they are worthy and can be trusted.

It's hard for Dafne to adjust to the old family homestead, especially the first night. She also notices something about her father.

A charming cat called Mirò and his many animal friends are featured in this beautiful animation for kids. The circle of friends get caught in a rainstorm and use colorful umbrellas to keep themselves dry.

Alberto Angela brings us to the Ancona Abyss, an immense cave chamber in the Natural Regional Park of Gola della Rossa and Frasassi in the Marches region. The spectacular Ancona Abyss and other innermost caves in the Frasassi cave system were only discovered in 1971.

Fabio Fazio gives Raffaella Carrà a great sendoff, replete with majorettes and a legendary marching band from a Milan district.

We get a glimpse of Imma as a parent. She is not so convinced about the value of cellphones. And she doesn't get along so well with her mother-in-law, either.