Alberto Angela tells us how these natural wonders were discovered by a group of young cave explorers from the nearby city of Ancona.

Camilla leaves Gaetano's apartment, sees her mother in an interesting situation, and finally ends up on the couch watching TV with her family. Then the news comes on.

There's some disagreement about inviting Maya's parents to the wedding, but then someone comes up with a novel idea. Melody brings Dino the tickets for the concert.

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

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

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.

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

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

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.

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.

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.

Virginia and Camilla meet up outside police headquarters, where Edoardo is waiting for Virginia. The two friends clarify some things and say their goodbyes. Meanwhile, Camilla gets a phone call from Gaetano who has an emergency.

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.

Among the staff at the health center, there is gossip circulating about Doctor Zanin's past job in Milan. Zanin then has a meeting with the new director.