In this season, the peripatetics will be about to finish High School and Merlí will be disappointed with the arrival of a new teacher, Silvana, who will win the sympathy of the students and will question the leadership of Merlí. Without his son Bruno, who continues in Rome, and with Carmina on a theatrical tour, Merlí will return to live alone, a fact that will not go very well. Philosophy will remain one of the hallmarks of the series, and thinkers such as Hannah Arendt, Albert Camus and Karl Marx will star in some of the episodes of Season Three.