Marioni interrupts a lesson by his colleague Guido and harshly confronts Nathan, ordering him to show up for rehearsals with the others. The tensions center around Sara, causing conflicts to explode in the group and bringing personal vulnerabilities to light.

Fabiola Gianotti here tells the story of how her passion for physics was born: from the influence of a great teacher and from reading Marie Curie's biography, to choosing physics as a fundamental discipline and arriving at CERN, experienced as an extraordinary place for scientific research.

Marika proposes another series of the quiz game "Guess what!". Let's see if you know where the fjords are, how a butterfly transforms or if you use vinegar. It's really fun to learn while playing!

Gaetano and Camilla discuss their relationship difficulties, including jealousy and advice on how to communicate better. The conversation intertwines with investigative work when Camilla asks for more information regarding the recent murder.

The circle is tightening and the police are investigating two possible profiles: a lawyer and an engineer. Between jokes and internal dynamics at the police station, two officers are assigned to interrogate engineer Senatore and two others go to Nubila.

Orbetello is a place where history and nature meet: from the seaplanes of the 1930s to the lagoon, today a precious ecosystem rich in wildlife and unique gastronomic traditions. A brief journey through landscapes, memories and the flavors of the area.

Domenico postpones his appointment with Gloria, who is hurt and fears something is wrong. Matteo tries to make peace with his uncle to confess that he has invited some friends to dinner, while Sara finds herself dealing with a disappointment that puts her to an emotional test.

A dive into memories of school years, between strikes, private schools, years of lead and friendships that left their mark. Between graduation grades, ski weeks, memorable quarrels and yellowed photos, the portrait of a group of very different girls takes shape, united by strong bonds, heated confrontations and that continuous need to prove something, especially to themselves.

Renzo, left without work, goes through a moment of deep frustration and is hurt when he discovers that Camilla tried to help him by turning to Gaetano. Between jealousy, pride and hurtful words, a domestic argument breaks out between the two that ends with Renzo's decision to go sleep on the studio couch.

While the little girl hovers between life and death in the hospital, the forensic police and investigators begin to dig into the past of the young woman found dead. A regular residence permit, jobs as a domestic worker in upscale neighborhoods, rent paid in cash and too many unanswered questions.

Marika takes us to discover Orbetello. A unique town on the Tuscan coast, built on a peninsula and surrounded by a brackish lagoon. Between breathtaking views of the Argentario, millennial history from the Etruscans to the Romans, ancient walls and the Cathedral of Santa Maria Assunta, this fascinating city tells centuries of art, culture and tradition.

In this part, Fabiola Gianotti retraces a moment from her childhood when she discovers the world of entertainment between singing festivals and voice acting. She thus learns discipline and commits herself with passion without neglecting school.

While Renzo celebrates a special occasion, at the police station investigators search for leads on the murder of a young woman found in a dump. Among abandoned cars and small clues, new details emerge, while at home Camilla tries to bring serenity back into the lives of the people she cares about.

The investigations are only at the beginning and the autopsy results are not yet available. For now it emerges that there are no signs of struggle and that the girl was caught by surprise. Meanwhile, at home, Giuseppe and Laura rediscover their complicity.

Between moments of daily life and traumatic memories, lightness and reflection intertwine. Matteo organizes an evening with friends, while Domenico has an intimate conversation about music and a love still apparently to be discovered.