In this moment of confrontation, Irene and Luca face the consequences of what happened, while within the group of students tension grows between some of them. Between misunderstandings, sense of responsibility and need for closeness, emotional conflicts and fragments of daily life alternate.

Gaetano notices that Camilla is more serene and she confides in him that Renzo, too, finally seems to have calmed down. However, the peace is shattered when Ventruti reaches the commissioner to get confirmation about the identity of the woman found dead. Devastated, the man lets all his pain emerge and reveals details that could prove crucial for the investigation.

The physicists describe their amazement at the grandeur of the detector, a symbol of collective scientific effort that unites different cultures to understand the universe. A work compared to a cathedral, an expression of science as part of civilization's progress.

A mysterious phone call casts Lojacono into shadow: a stranger from Agrigento hints at an unpaid mortgage and lets slip a veiled threat.
Meanwhile, Romano focuses all his anguish on little Giorgia. Between fear and hope, the doctors try to reassure him about the child's condition.

A song about pain and heartbreak serves as background to the students who receive news of maestro Marioni's absence, due to a minor accident. The suspension of orchestra rehearsals generates different reactions among the young people, between relief, expectations for an upcoming concert and reflections on shared work.

Anna and Camilla enter Quantunque's apartment to understand why he hasn't been to the restaurant anymore; the only suspicious element is a suitcase locked with a combination. Meanwhile, at home, Renzo appears more serene after talking with his mother-in-law and attempts a reconciliation by preparing dinner.

Fabiola and her colleagues retrace the long journey toward the discovery of the Higgs boson: from Peter Higgs' theoretical intuition to the difficult meetings at CERN, up to the realization of the Large Hadron Collider, initially considered almost impossible.

Rosaria appears very impressed by Alex's new house and, between one compliment and another, updates her partner on the latest developments in the investigation. Meanwhile Lojacono goes to the restaurant to see Letizia, who welcomes him by offering a rich and inviting selection of typical Neapolitan dishes.

Rosario is troubled and, returning home, confides to his foster parents that he will meet his mother in his own way, alone. Meanwhile, Sofia and her brother exchange sharp remarks, while Marioni relives memories from the past, and a sudden bicycle accident transforms a quiet evening into a moment of great apprehension.

Anna is worried about Quantunque and asks Camilla to accompany her to his house to understand how he is, since he didn't come to the restaurant. Meanwhile, Torre and Piccolo enter Torrielli's apartment, finding it completely turned upside down: no clear clues emerge, except for elements that suggest an ambiguous professionalism.

In this part, the encounter with physicist Fabiola Gianotti at CERN is retraced, highlighting her scientific talent, humanity and prominent role in international research. Between personal memories and reflections on theoretical and experimental physics, the importance of collaboration between the two fields emerges, recalled by the example of the discovery of the Higgs boson.

Between interrogations, conflicting leads and multiplying suspicions, secrets emerge linked to the victim and their private life. Meanwhile Romano faces the weight of his own guilt and the violence he committed but is called back to a sense of responsibility by the group.

Through song, Matteo, rejected by Barbara, who chooses to remain just a friend, expresses his pain. Sofia's unconfessed feelings also emerge, as she loves Matteo in silence.

Commissioner Berardi investigates the disappearance of Mrs. Torrielli and, during an inspection, interrogates the widower Ventruti. In an informal setting, over coffee, an important detail emerges: Flora's new address.

In the video Renzo Piano and Fabiola tell about CERN as a symbol of the cultural and scientific rebirth of the post-war period. Through personal memories and everyday dialogues, CERN emerges as a place of human and international encounter, founded on curiosity, peaceful collaboration and love for knowledge.